How to Solve NPM Error: listen EADDRINUSE 127.0.0.1:8080

Error:Listening to EADDRINUSE 127.0.0.1:8080 on the server
. setupListenHandle [as _listen2] (net.js:1335:14)
at listenInCluster (net.js: 1381:12)
at GetAddrInfoReqWrapdoListen [as callback] (net.js:1509:7)
at GetAddrInfoReqWrap. onlookup [as oncomplete] (dn .js:61:10)
at :
at emitErrorNT (net.js:1362:8)
at process. _tickCallback (internal/process/next_tick.js:63:19)
npm ERR!
npm !’ cross-env NODE_ENV=development webpack-dev-server -open -inline -hot -port 8080 ‘
npm ERR!exit status 1
npm ERR!
npm error! Failed in development script.
npm ERR! This may not be a problem with npm. There may be additional log output above.
npm Error! The full log of this run can be found in the following file:
C:\Users\MX\AppData\Roaming\npm-cache\_logs\ 2018 – 07 – 24 – t09_07_38_445z debug. Logs
EADDRINUSE:The given address is already in use
Port is occupied
Solution.

sudo lsof -i :8088 // View port usage
sudo kill -9 47862 // kill the displayed PID

 

Docker Startup Error: standard_init_linux.go:211: exec user process caused “no such file or directory”

As shown in the question, start the Docker container according to the image built by yourself, exit directly, and check the error message in the container log without any other information. Internet search this problem, found that many people have encountered, the solution is also different, finally found an article. Inspired, my project is a Java project that builds a service running in the background with the ENTRYPOINT command starting the script docker-entrypoint.sh. My Docker-entrypoint. sh is edited under Windows, and the natural FileFormat is DOS. Here, it needs to be modified to Unix, and the modification method is also very simple. There is no need to operate under Linux.

After the modification is completed, the image can be built again. If the new image is started, no error will be reported, which is usually difficult to detect. I hereby record it, hoping to help someone who has encountered this mistake.

How to Solve BFSVC Error: Could not open the BCD template store.

Specific errors are as follows:

BFSVC Error: Could not open the BCD template store.Status=[c000000f]

In Baidu know to answer the question, encounter a netizen Win10 computer into the system, prompt BCD error.
Reset the BCD, go to troubleshooter, advanced options, command prompt, execute:

bootrec /rebuildbcd

The result is no good, prompt system cannot find the specified path. (The problem cannot be restored later, so it cannot be tested)
Execute diskPart and know GPT mode from list disk. Sel disk 0, List Part. Sel Part 1, assign letter Z, assign letter Z, assign letter Z.
The most important step is to make sure the Windows directory is on drive C by switching to Drive C, dir/A. So execute:

bcdboot c:\windows /s z: /f uefi /l zh-cn

Status=[c000000f] BFSVC Error: Could not open the BCD template store.status =[c000000f]
In this case, you can follow it with/V to see the details. At that time, I thought there was a problem with the BCD-Template file.
Because the general system files, WinSXS have relevant backup, so execute:
CD C :\ Windows \ System32 \ Configren BCD-BAK, I can restore CD C :\ Windows \ Winsxscd * bcdTemplate * if necessary. This is the path I found by searching everything on my computer. Because the folder name is too long, I use the wildcard instead. copy bcd-template c:\windows\system32\config

This method may not work on some Win10, because winSXS bCD-Template may not be a registry file, win7 is a registry file, users can also win10 computer.
will not work, if you want to use the bcdboot command to fix it, you can only copy the bcd-template from the config directory on the same system computer to your own computer.

Net friend executes above command while, I also search relevant data on the net.
Some netizens said, bCD-Template is out of order, using SFC to repair, win10 tested SFC does not support to repair the file. Others said that they had the same problem and that they had mixed up \ and/or.
Seeing this, I went back to see the user executed the command, sure enough, “Bcdboot c:/ Windows…” “To” Bcdboot c:\ Windows…” Command executed successfully! After restarting, the system can enter normally.
So, you can’t take these punctuation marks lightly.

Android Error: Consumer closed input channel or an error occurred. events=0x9

Android. OS. DeadObjectException memory near r0: exception handling

android.os.DeadObjectException
08-15 14:39:32. 486: W/System. Err (1767) : an android. The OS. BinderProxy. Transact (Native Method)
486: I/ActivityManager(1767): Process com.my.Test (PID 25619) has died.
08-15 14:39:32.486: W/ActivityManager(1767): Force Removal ActivityRecord{42afefe8 com.my.tes/.MyCmge}: app died, no saved state
08-15 14:39:32. 486: W/WindowManager (1767) : the Force – o child Windows Window {441 d3f70 PopupWindow: 4299 edc8 paused = false} the from the container Window {42 ae1b88 com. My. Tes/com. My. Tes. MyCmge paused = false}
08-15 14:39:32. 491: W/System. Err (1767) : an android. The IWindow $$Proxy stubs. OffsetWindowForKeyguard (IWindow. Java: 471)
08-15 14:39:32. 491: W/InputDispatcher (1767) : channel ‘441 da238 com. My. Tes/com. My. Tes. MyCmge (server)’ ~ Consumer closed input channel or an error occurred. The events = 0 x9
08-15 14:39:32. 491: E/InputDispatcher (1767) : channel ‘441 da238 com. My. Tes/com. My. Tes. MyCmge (server)’ ~ channel is unrecoverably broken and will be disposed.
08-15 14:39:32. 491: W/System. Err (1767) : at the android. Server. Wm. WindowStateAnimator. DestroySurfaceLocked (WindowStateAnimator. Java: 803)
08-15 14:39:32. 491: W/System. Err (1767) : at the android. Server. Wm. WindowState. RemoveLocked (WindowState. Java: 832)
08-15 14:39:32. 491: W/System. Err (1767) : at the android. Server. Wm. WindowManagerService. RemoveWindowInnerLocked (WindowManagerService. Java: 2522)
08-15 14:39:32. 491: W/System. Err (1767) : at the android. Server. Wm. WindowManagerService. RemoveWindowInnerLocked (WindowManagerService. Java: 2506)
491: D/Zygote(1550): Process 25619 by signal (11)
08-15 14:39:32. 491: W/System. Err (1767) : at the android. Server. Wm. WindowManagerService. RemoveWindowLocked (WindowManagerService. Java: 2484)
08-15 14:39:32. 491: W/System. Err (1767) : at the android. Server wm. WindowState $DeathRecipient. BinderDied (WindowState. Java: 869)
08-15 14:39:32. 491: W/System. Err (1767) : an android. The OS. BinderProxy. SendDeathNotice (449) Binder. Java:
08-15 14:39:32. 491: W/System. Err (1767) : at dalvik. System. NativeStart. Run (Native Method)
491: I/AKMD2(1767): AK8975/B for Android end
08-15 14:39:32 491: D/AKMD2(1767): AKMD2: Compass Closed.
08-15 14:39:32.491: D/Sensors(1767): AKM :setDelay():handle 1, delay 20000000 ns.
08-15 14:39:32.496: D/AKMD2(1767): ACC_thread_main: update delay_MS to 66.

Since I was using someone else’s SDK, I could not change the source code, so I asked Daniel for help and used the following method to solve it easily

application
Android: hardwareAccelerated = “false”…
In the application tag to add a android: hardwareAccelerated = “false” (disable hardware acceleration)
So the problem was solved,
At the beginning, I added it to the corresponding activity tag. As a result, I found that it could run perfectly for the first time and this problem would occur again after a period of time.
To change the application, the android: hardwareAccelerated = “false” so good,

Uncaught Error: Error calling method on NPObject.

1. Error description

Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. 
For more help, check http://xhr.spec.whatwg.org/.

Get the first value: undefined

Uncaught Error: Error calling method on NPObject.
Uncaught 
Error: Error calling method on NPObject.

2. Error reason

function windowOnload() {
	Report.LoadFromURL("student.grf?date="+(new Date().getTime()));
	$.ajax({
		url:"param/isPrint",
		type:"get",
		dataType:"json",
		async:false,
	}).done(function(resp){
	   if(dt.success==false){
			return;
	   }
	   var isPrint=resp.isPrint;

	   $.ajax({
		    url:"student/stu/findStu",
			type:"get",
			dataType:"json",
			data:{},
			async:false
		}).done(function(data){
		   if(!data){
			   return;
		   }
		   var report = JSON.stringify(data);
		   Report.LoadDataFromAjaxRequest(report,"application/json;charset=UTF-8");
		   Report.Print(isPrint);
		});
	});
}

When making Report by Grid++Report, whether to open the print window is controlled by a parameter isPrint; When isPrint=true, the print window is displayed, otherwise it is not displayed. However, if the query results do not have this parameter and are used directly in Print(isPrint), an Error Error will be reported calling method on NPObject

3. Solutions
Add the judgment before report.print (isPrint) USES this parameter

function windowOnload() {
	Report.LoadFromURL("student.grf?date="+(new Date().getTime()));
	$.ajax({
		url:"param/isPrint",
		type:"get",
		dataType:"json",
		async:false,
	}).done(function(resp){
	   if(dt.success==false){
			return;
	   }
	   var isPrint=resp.isPrint;

	   $.ajax({
		    url:"student/stu/findStu",
			type:"get",
			dataType:"json",
			data:{},
			async:false
		}).done(function(data){
		   if(!data){
			   return;
		   }
		   var report = JSON.stringify(data);
		   Report.LoadDataFromAjaxRequest(report,"application/json;charset=UTF-8");
		   Report.Print(isPrint?true:false);
		});
	});
}

RPC failed; curl 56 SSLRead() return error

RPC failed; curl 56 SSLRead() returned an error
Git failed during cloning or fetching with the following error:
git clone http://stash.company.com:7990/scm/proj/repo.git
Fatal:Early EOF
Fatal:Unexpected hang on remote side
Fatal:indexpack failed
Error:RPC failed; result=56, HTTP code = 200
Completion has errors, see above.
Diagnosis
Temporarily disable any firewall or antivirus software and try cloning again.
To turn on Git debug logging, do the following for different operating systems before using command line push:
On Linux
In Linux, execute the following command from the command line before executing the Git command:
export GIT_TRACE_PACKET=1
export GIT_TRACE=1
export GIT_CURL_VERBOSE=1
On Windows
Before executing the Git command, execute the following command from the command line:
set GIT_TRACE_PACKET=1
set GIT_TRACE=1
set GIT_CURL_VERBOSE=1
Cause
Issue 1:
Error code 56 indicates that curl received a CURLE_RECV_ERROR error, which means that there is some problem in the cloning process that is preventing the data from being received. This is usually caused by network settings, firewalls, VPN clients, or antivirus software that terminates the connection before all data is transferred.

“Failed to load resource: net::ERR_FILE_NOT_FOUND” error. The project created by vue-cli 3.0 can run under dev, and an error is reported after packaging, and the page is blank.

Cli3.0 Solutions:
Failed to Load Resource: net::ERR_FILE_NOT_FOUND
Dist /index.html, the introduction is problematic,

The webPack configuration file cannot be found in the project created by Ue-CLi 3.0, because it is encapsulated by Ue-CLi 3.0. You only need to modify it in the vue.config.js file in the root directory of the project (if the project does not have this file, add one directly in the root directory), and set the baseUrl value to ‘./ ‘, and modify as follows

const webpack = require("webpack");
module.exports = {
    pluginOptions: new webpack.ProvidePlugin({
        jQuery: "jquery",
        $: "jquery"
    }),
    baseUrl: './' // ADD these codes
};

Cli2.x Solutions:
Open config/index.js file and build-> AssetsPublicPath is changed to “./ “, which is preceded by a dot.

build: {
  // Template for index.html
  index: path.resolve(__dirname, '../dist/index.html'),

  // Paths
  assetsRoot: path.resolve(__dirname, '../dist'),
  assetsSubDirectory: 'static',
  assetsPublicPath: './',  // Here
}

Ok, 2. X 3.0 is all done
Please indicate the source of the reprint

command ‘gcc’ failed with exit status 1 error while installing scrapy

When I tried to install Scrapy I got this error:

    warning: no previously-included files found matching '*.py'
Requirement already satisfied (use --upgrade to upgrade): pyOpenSSL in /usr/local/lib/python2.7/site-packages/pyOpenSSL-0.14-py2.7.egg (from Scrapy)
Requirement already satisfied (use --upgrade to upgrade): cssselect>=0.9 in /usr/local/lib/python2.7/site-packages/cssselect-0.9.1-py2.7.egg (from Scrapy)
Requirement already satisfied (use --upgrade to upgrade): six>=1.5.2 in /usr/local/lib/python2.7/site-packages/six-1.6.1-py2.7.egg (from Scrapy)
Downloading/unpacking zope.interface>=3.6.0 (from Twisted>=10.0.0->Scrapy)
  Downloading zope.interface-4.1.1.tar.gz (864kB): 864kB downloaded
  Running setup.py (path:/tmp/pip_build_root/zope.interface/setup.py) egg_info for package zope.interface

    warning: no previously-included files matching '*.dll' found anywhere in distribution
    warning: no previously-included files matching '*.pyc' found anywhere in distribution
    warning: no previously-included files matching '*.pyo' found anywhere in distribution
    warning: no previously-included files matching '*.so' found anywhere in distribution
Downloading/unpacking cryptography>=0.2.1 (from pyOpenSSL->Scrapy)
  Downloading cryptography-0.4.tar.gz (260kB): 260kB downloaded
  Running setup.py (path:/tmp/pip_build_root/cryptography/setup.py) egg_info for package cryptography
    Package libffi was not found in the pkg-config search path.
    Perhaps you should add the directory containing `libffi.pc'
    to the PKG_CONFIG_PATH environment variable
    No package 'libffi' found
    Package libffi was not found in the pkg-config search path.
    Perhaps you should add the directory containing `libffi.pc'
    to the PKG_CONFIG_PATH environment variable
    No package 'libffi' found
    Package libffi was not found in the pkg-config search path.
    Perhaps you should add the directory containing `libffi.pc'
    to the PKG_CONFIG_PATH environment variable
    No package 'libffi' found
    Package libffi was not found in the pkg-config search path.
    Perhaps you should add the directory containing `libffi.pc'
    to the PKG_CONFIG_PATH environment variable
    No package 'libffi' found
    Package libffi was not found in the pkg-config search path.
    Perhaps you should add the directory containing `libffi.pc'
    to the PKG_CONFIG_PATH environment variable
    No package 'libffi' found
    c/_cffi_backend.c:14:17: error: ffi.h: No such file or directory
    In file included from c/_cffi_backend.c:21:
    c/malloc_closure.h:33: error: expected specifier-qualifier-list before 'ffi_closure'
    c/malloc_closure.h: In function 'more_core':
    c/malloc_closure.h:69: warning: division by zero
    c/malloc_closure.h:96: error: 'union mmaped_block' has no member named 'next'
    c/malloc_closure.h: At top level:
    c/malloc_closure.h:105: error: expected ')' before '*' token
    c/malloc_closure.h:113: error: expected '=', ',', ';', 'asm' or '__attribute__' before '*' token
    c/_cffi_backend.c:187: error: expected specifier-qualifier-list before 'ffi_cif'
    c/_cffi_backend.c: In function 'cdataowninggc_dealloc':
    c/_cffi_backend.c:1499: error: 'ffi_closure' undeclared (first use in this function)
    c/_cffi_backend.c:1499: error: (Each undeclared identifier is reported only once
    c/_cffi_backend.c:1499: error: for each function it appears in.)
    c/_cffi_backend.c:1499: error: 'closure' undeclared (first use in this function)
    c/_cffi_backend.c:1499: error: expected expression before ')' token
    c/_cffi_backend.c:1502: warning: implicit declaration of function 'cffi_closure_free'
    c/_cffi_backend.c: In function 'cdataowninggc_traverse':
    c/_cffi_backend.c:1514: error: 'ffi_closure' undeclared (first use in this function)
    c/_cffi_backend.c:1514: error: 'closure' undeclared (first use in this function)
    c/_cffi_backend.c:1514: error: expected expression before ')' token
    c/_cffi_backend.c: In function 'cdataowninggc_clear':
    c/_cffi_backend.c:1530: error: 'ffi_closure' undeclared (first use in this function)
    c/_cffi_backend.c:1530: error: 'closure' undeclared (first use in this function)
    c/_cffi_backend.c:1530: error: expected expression before ')' token
    c/_cffi_backend.c: In function 'cdataowning_repr':
    c/_cffi_backend.c:1654: error: 'ffi_closure' undeclared (first use in this function)
    c/_cffi_backend.c:1654: error: expected expression before ')' token
    c/_cffi_backend.c: At top level:
    c/_cffi_backend.c:2200: error: expected declaration specifiers or '...' before 'ffi_abi'
    c/_cffi_backend.c: In function 'cdata_call':
    c/_cffi_backend.c:2334: error: 'ffi_abi' undeclared (first use in this function)
    c/_cffi_backend.c:2334: error: expected ';' before 'fabi'
    c/_cffi_backend.c:2376: error: 'fabi' undeclared (first use in this function)
    c/_cffi_backend.c:2380: error: too many arguments to function 'fb_prepare_cif'
    c/_cffi_backend.c:2385: error: 'cif_description_t' has no member named 'exchange_size'
    c/_cffi_backend.c:2395: error: 'cif_description_t' has no member named 'exchange_offset_arg'
    c/_cffi_backend.c:2425: error: 'cif_description_t' has no member named 'exchange_offset_arg'
    c/_cffi_backend.c:2430: warning: implicit declaration of function 'ffi_call'
    c/_cffi_backend.c:2430: error: 'cif_description_t' has no member named 'cif'
    c/_cffi_backend.c: In function 'b_new_primitive_type':
    c/_cffi_backend.c:3334: error: 'ffi_type' undeclared (first use in this function)
    c/_cffi_backend.c:3334: error: 'ffitype' undeclared (first use in this function)
    c/_cffi_backend.c:3355: error: 'ffi_type_sint8' undeclared (first use in this function)
    c/_cffi_backend.c:3356: error: 'ffi_type_sint16' undeclared (first use in this function)
    c/_cffi_backend.c:3357: error: 'ffi_type_sint32' undeclared (first use in this function)
    c/_cffi_backend.c:3358: error: 'ffi_type_sint64' undeclared (first use in this function)
    c/_cffi_backend.c:3364: error: 'ffi_type_float' undeclared (first use in this function)
    c/_cffi_backend.c:3366: error: 'ffi_type_double' undeclared (first use in this function)
    c/_cffi_backend.c:3368: error: 'ffi_type_longdouble' undeclared (first use in this function)
    c/_cffi_backend.c:3374: error: 'ffi_type_uint8' undeclared (first use in this function)
    c/_cffi_backend.c:3375: error: 'ffi_type_uint16' undeclared (first use in this function)
    c/_cffi_backend.c:3376: error: 'ffi_type_uint32' undeclared (first use in this function)
    c/_cffi_backend.c:3377: error: 'ffi_type_uint64' undeclared (first use in this function)
    c/_cffi_backend.c: At top level:
    c/_cffi_backend.c:3931: error: expected specifier-qualifier-list before 'ffi_type'
    c/_cffi_backend.c:3950: error: expected '=', ',', ';', 'asm' or '__attribute__' before '*' token
    c/_cffi_backend.c: In function 'fb_build':
    c/_cffi_backend.c:4081: error: 'struct funcbuilder_s' has no member named 'atypes'
    c/_cffi_backend.c:4081: error: 'ffi_type' undeclared (first use in this function)
    c/_cffi_backend.c:4081: error: expected expression before ')' token
    c/_cffi_backend.c:4082: error: 'struct funcbuilder_s' has no member named 'nargs'
    c/_cffi_backend.c:4085: error: 'struct funcbuilder_s' has no member named 'rtype'
    c/_cffi_backend.c:4085: warning: implicit declaration of function 'fb_fill_type'
    c/_cffi_backend.c:4093: error: 'cif_description_t' has no member named 'exchange_offset_arg'
    c/_cffi_backend.c:4096: error: 'struct funcbuilder_s' has no member named 'rtype'
    c/_cffi_backend.c:4097: error: 'ffi_arg' undeclared (first use in this function)
    c/_cffi_backend.c:4107: error: 'atype' undeclared (first use in this function)
    c/_cffi_backend.c:4120: error: 'struct funcbuilder_s' has no member named 'atypes'
    c/_cffi_backend.c:4121: error: 'struct funcbuilder_s' has no member named 'atypes'
    c/_cffi_backend.c:4124: error: 'cif_description_t' has no member named 'exchange_offset_arg'
    c/_cffi_backend.c:4131: error: 'cif_description_t' has no member named 'exchange_size'
    c/_cffi_backend.c: In function 'fb_build_name':
    c/_cffi_backend.c:4153: error: 'struct funcbuilder_s' has no member named 'nargs'
    c/_cffi_backend.c:4162: error: 'struct funcbuilder_s' has no member named 'fct'
    c/_cffi_backend.c:4164: error: 'struct funcbuilder_s' has no member named 'fct'
    c/_cffi_backend.c: In function 'fb_prepare_ctype':
    c/_cffi_backend.c:4205: error: 'struct funcbuilder_s' has no member named 'fct'
    c/_cffi_backend.c:4215: error: 'struct funcbuilder_s' has no member named 'fct'
    c/_cffi_backend.c: At top level:
    c/_cffi_backend.c:4235: error: expected declaration specifiers or '...' before 'ffi_abi'
    c/_cffi_backend.c: In function 'fb_prepare_cif':
    c/_cffi_backend.c:4262: warning: implicit declaration of function 'ffi_prep_cif'
    c/_cffi_backend.c:4262: error: 'cif_description_t' has no member named 'cif'
    c/_cffi_backend.c:4262: error: 'fabi' undeclared (first use in this function)
    c/_cffi_backend.c:4262: error: 'struct funcbuilder_s' has no member named 'nargs'
    c/_cffi_backend.c:4263: error: 'struct funcbuilder_s' has no member named 'rtype'
    c/_cffi_backend.c:4263: error: 'struct funcbuilder_s' has no member named 'atypes'
    c/_cffi_backend.c:4263: error: 'FFI_OK' undeclared (first use in this function)
    c/_cffi_backend.c: In function 'b_new_function_type':
    c/_cffi_backend.c:4280: error: 'FFI_DEFAULT_ABI' undeclared (first use in this function)
    c/_cffi_backend.c:4318: error: too many arguments to function 'fb_prepare_cif'
    c/_cffi_backend.c:4326: error: 'struct funcbuilder_s' has no member named 'nargs'
    c/_cffi_backend.c:4336: error: 'struct funcbuilder_s' has no member named 'nargs'
    c/_cffi_backend.c: In function 'convert_from_object_fficallback':
    c/_cffi_backend.c:4360: error: 'ffi_arg' undeclared (first use in this function)
    c/_cffi_backend.c: At top level:
    c/_cffi_backend.c:4432: error: expected ')' before '*' token
    c/_cffi_backend.c: In function 'b_callback':
    c/_cffi_backend.c:4503: error: 'ffi_closure' undeclared (first use in this function)
    c/_cffi_backend.c:4503: error: 'closure' undeclared (first use in this function)
    c/_cffi_backend.c:4524: error: 'ffi_arg' undeclared (first use in this function)
    c/_cffi_backend.c:4542: warning: implicit declaration of function 'cffi_closure_alloc'
    c/_cffi_backend.c:4559: warning: implicit declaration of function 'ffi_prep_closure'
    c/_cffi_backend.c:4559: error: 'cif_description_t' has no member named 'cif'
    c/_cffi_backend.c:4560: error: 'invoke_callback' undeclared (first use in this function)
    c/_cffi_backend.c:4560: error: 'FFI_OK' undeclared (first use in this function)
    c/_cffi_backend.c: In function 'init_cffi_backend':
    c/_cffi_backend.c:5489: error: 'FFI_DEFAULT_ABI' undeclared (first use in this function)
    Traceback (most recent call last):
      File "<string>", line 17, in <module>
      File "/tmp/pip_build_root/cryptography/setup.py", line 174, in <module>
        "test": PyTest,
      File "/usr/local/lib/python2.7/distutils/core.py", line 112, in setup
        _setup_distribution = dist = klass(attrs)
      File "build/bdist.linux-x86_64/egg/setuptools/dist.py", line 260, in __init__
      File "build/bdist.linux-x86_64/egg/setuptools/dist.py", line 285, in fetch_build_eggs
      File "build/bdist.linux-x86_64/egg/pkg_resources.py", line 631, in resolve
      File "build/bdist.linux-x86_64/egg/pkg_resources.py", line 871, in best_match
      File "build/bdist.linux-x86_64/egg/pkg_resources.py", line 883, in obtain
      File "build/bdist.linux-x86_64/egg/setuptools/dist.py", line 335, in fetch_build_egg
      File "build/bdist.linux-x86_64/egg/setuptools/command/easy_install.py", line 595, in easy_install
      File "build/bdist.linux-x86_64/egg/setuptools/command/easy_install.py", line 625, in install_item
      File "build/bdist.linux-x86_64/egg/setuptools/command/easy_install.py", line 822, in install_eggs
      File "build/bdist.linux-x86_64/egg/setuptools/command/easy_install.py", line 1028, in build_and_install
      File "build/bdist.linux-x86_64/egg/setuptools/command/easy_install.py", line 1016, in run_setup
    distutils.errors.DistutilsError: Setup script exited with error: command 'gcc' failed with exit status 1
    Complete output from command python setup.py egg_info:
    Package libffi was not found in the pkg-config search path.

Perhaps you should add the directory containing `libffi.pc'

to the PKG_CONFIG_PATH environment variable

No package 'libffi' found

Package libffi was not found in the pkg-config search path.

Perhaps you should add the directory containing `libffi.pc'

to the PKG_CONFIG_PATH environment variable

No package 'libffi' found

Package libffi was not found in the pkg-config search path.

Perhaps you should add the directory containing `libffi.pc'

to the PKG_CONFIG_PATH environment variable

No package 'libffi' found

Package libffi was not found in the pkg-config search path.

Perhaps you should add the directory containing `libffi.pc'

to the PKG_CONFIG_PATH environment variable

No package 'libffi' found

Package libffi was not found in the pkg-config search path.

Perhaps you should add the directory containing `libffi.pc'

to the PKG_CONFIG_PATH environment variable

No package 'libffi' found

c/_cffi_backend.c:14:17: error: ffi.h: No such file or directory

In file included from c/_cffi_backend.c:21:

c/malloc_closure.h:33: error: expected specifier-qualifier-list before 'ffi_closure'

c/malloc_closure.h: In function 'more_core':

c/malloc_closure.h:69: warning: division by zero

c/malloc_closure.h:96: error: 'union mmaped_block' has no member named 'next'

c/malloc_closure.h: At top level:

c/malloc_closure.h:105: error: expected ')' before '*' token

c/malloc_closure.h:113: error: expected '=', ',', ';', 'asm' or '__attribute__' before '*' token

c/_cffi_backend.c:187: error: expected specifier-qualifier-list before 'ffi_cif'

c/_cffi_backend.c: In function 'cdataowninggc_dealloc':

c/_cffi_backend.c:1499: error: 'ffi_closure' undeclared (first use in this function)

c/_cffi_backend.c:1499: error: (Each undeclared identifier is reported only once

c/_cffi_backend.c:1499: error: for each function it appears in.)

c/_cffi_backend.c:1499: error: 'closure' undeclared (first use in this function)

c/_cffi_backend.c:1499: error: expected expression before ')' token

c/_cffi_backend.c:1502: warning: implicit declaration of function 'cffi_closure_free'

c/_cffi_backend.c: In function 'cdataowninggc_traverse':

c/_cffi_backend.c:1514: error: 'ffi_closure' undeclared (first use in this function)

c/_cffi_backend.c:1514: error: 'closure' undeclared (first use in this function)

c/_cffi_backend.c:1514: error: expected expression before ')' token

c/_cffi_backend.c: In function 'cdataowninggc_clear':

c/_cffi_backend.c:1530: error: 'ffi_closure' undeclared (first use in this function)

c/_cffi_backend.c:1530: error: 'closure' undeclared (first use in this function)

c/_cffi_backend.c:1530: error: expected expression before ')' token

c/_cffi_backend.c: In function 'cdataowning_repr':

c/_cffi_backend.c:1654: error: 'ffi_closure' undeclared (first use in this function)

c/_cffi_backend.c:1654: error: expected expression before ')' token

c/_cffi_backend.c: At top level:

c/_cffi_backend.c:2200: error: expected declaration specifiers or '...' before 'ffi_abi'

c/_cffi_backend.c: In function 'cdata_call':

c/_cffi_backend.c:2334: error: 'ffi_abi' undeclared (first use in this function)

c/_cffi_backend.c:2334: error: expected ';' before 'fabi'

c/_cffi_backend.c:2376: error: 'fabi' undeclared (first use in this function)

c/_cffi_backend.c:2380: error: too many arguments to function 'fb_prepare_cif'

c/_cffi_backend.c:2385: error: 'cif_description_t' has no member named 'exchange_size'

c/_cffi_backend.c:2395: error: 'cif_description_t' has no member named 'exchange_offset_arg'

c/_cffi_backend.c:2425: error: 'cif_description_t' has no member named 'exchange_offset_arg'

c/_cffi_backend.c:2430: warning: implicit declaration of function 'ffi_call'

c/_cffi_backend.c:2430: error: 'cif_description_t' has no member named 'cif'

c/_cffi_backend.c: In function 'b_new_primitive_type':

c/_cffi_backend.c:3334: error: 'ffi_type' undeclared (first use in this function)

c/_cffi_backend.c:3334: error: 'ffitype' undeclared (first use in this function)

c/_cffi_backend.c:3355: error: 'ffi_type_sint8' undeclared (first use in this function)

c/_cffi_backend.c:3356: error: 'ffi_type_sint16' undeclared (first use in this function)

c/_cffi_backend.c:3357: error: 'ffi_type_sint32' undeclared (first use in this function)

c/_cffi_backend.c:3358: error: 'ffi_type_sint64' undeclared (first use in this function)

c/_cffi_backend.c:3364: error: 'ffi_type_float' undeclared (first use in this function)

c/_cffi_backend.c:3366: error: 'ffi_type_double' undeclared (first use in this function)

c/_cffi_backend.c:3368: error: 'ffi_type_longdouble' undeclared (first use in this function)

c/_cffi_backend.c:3374: error: 'ffi_type_uint8' undeclared (first use in this function)

c/_cffi_backend.c:3375: error: 'ffi_type_uint16' undeclared (first use in this function)

c/_cffi_backend.c:3376: error: 'ffi_type_uint32' undeclared (first use in this function)

c/_cffi_backend.c:3377: error: 'ffi_type_uint64' undeclared (first use in this function)

c/_cffi_backend.c: At top level:

c/_cffi_backend.c:3931: error: expected specifier-qualifier-list before 'ffi_type'

c/_cffi_backend.c:3950: error: expected '=', ',', ';', 'asm' or '__attribute__' before '*' token

c/_cffi_backend.c: In function 'fb_build':

c/_cffi_backend.c:4081: error: 'struct funcbuilder_s' has no member named 'atypes'

c/_cffi_backend.c:4081: error: 'ffi_type' undeclared (first use in this function)

c/_cffi_backend.c:4081: error: expected expression before ')' token

c/_cffi_backend.c:4082: error: 'struct funcbuilder_s' has no member named 'nargs'

c/_cffi_backend.c:4085: error: 'struct funcbuilder_s' has no member named 'rtype'

c/_cffi_backend.c:4085: warning: implicit declaration of function 'fb_fill_type'

c/_cffi_backend.c:4093: error: 'cif_description_t' has no member named 'exchange_offset_arg'

c/_cffi_backend.c:4096: error: 'struct funcbuilder_s' has no member named 'rtype'

c/_cffi_backend.c:4097: error: 'ffi_arg' undeclared (first use in this function)

c/_cffi_backend.c:4107: error: 'atype' undeclared (first use in this function)

c/_cffi_backend.c:4120: error: 'struct funcbuilder_s' has no member named 'atypes'

c/_cffi_backend.c:4121: error: 'struct funcbuilder_s' has no member named 'atypes'

c/_cffi_backend.c:4124: error: 'cif_description_t' has no member named 'exchange_offset_arg'

c/_cffi_backend.c:4131: error: 'cif_description_t' has no member named 'exchange_size'

c/_cffi_backend.c: In function 'fb_build_name':

c/_cffi_backend.c:4153: error: 'struct funcbuilder_s' has no member named 'nargs'

c/_cffi_backend.c:4162: error: 'struct funcbuilder_s' has no member named 'fct'

c/_cffi_backend.c:4164: error: 'struct funcbuilder_s' has no member named 'fct'

c/_cffi_backend.c: In function 'fb_prepare_ctype':

c/_cffi_backend.c:4205: error: 'struct funcbuilder_s' has no member named 'fct'

c/_cffi_backend.c:4215: error: 'struct funcbuilder_s' has no member named 'fct'

c/_cffi_backend.c: At top level:

c/_cffi_backend.c:4235: error: expected declaration specifiers or '...' before 'ffi_abi'

c/_cffi_backend.c: In function 'fb_prepare_cif':

c/_cffi_backend.c:4262: warning: implicit declaration of function 'ffi_prep_cif'

c/_cffi_backend.c:4262: error: 'cif_description_t' has no member named 'cif'

c/_cffi_backend.c:4262: error: 'fabi' undeclared (first use in this function)

c/_cffi_backend.c:4262: error: 'struct funcbuilder_s' has no member named 'nargs'

c/_cffi_backend.c:4263: error: 'struct funcbuilder_s' has no member named 'rtype'

c/_cffi_backend.c:4263: error: 'struct funcbuilder_s' has no member named 'atypes'

c/_cffi_backend.c:4263: error: 'FFI_OK' undeclared (first use in this function)

c/_cffi_backend.c: In function 'b_new_function_type':

c/_cffi_backend.c:4280: error: 'FFI_DEFAULT_ABI' undeclared (first use in this function)

c/_cffi_backend.c:4318: error: too many arguments to function 'fb_prepare_cif'

c/_cffi_backend.c:4326: error: 'struct funcbuilder_s' has no member named 'nargs'

c/_cffi_backend.c:4336: error: 'struct funcbuilder_s' has no member named 'nargs'

c/_cffi_backend.c: In function 'convert_from_object_fficallback':

c/_cffi_backend.c:4360: error: 'ffi_arg' undeclared (first use in this function)

c/_cffi_backend.c: At top level:

c/_cffi_backend.c:4432: error: expected ')' before '*' token

c/_cffi_backend.c: In function 'b_callback':

c/_cffi_backend.c:4503: error: 'ffi_closure' undeclared (first use in this function)

c/_cffi_backend.c:4503: error: 'closure' undeclared (first use in this function)

c/_cffi_backend.c:4524: error: 'ffi_arg' undeclared (first use in this function)

c/_cffi_backend.c:4542: warning: implicit declaration of function 'cffi_closure_alloc'

c/_cffi_backend.c:4559: warning: implicit declaration of function 'ffi_prep_closure'

c/_cffi_backend.c:4559: error: 'cif_description_t' has no member named 'cif'

c/_cffi_backend.c:4560: error: 'invoke_callback' undeclared (first use in this function)

c/_cffi_backend.c:4560: error: 'FFI_OK' undeclared (first use in this function)

c/_cffi_backend.c: In function 'init_cffi_backend':

c/_cffi_backend.c:5489: error: 'FFI_DEFAULT_ABI' undeclared (first use in this function)

Traceback (most recent call last):

  File "<string>", line 17, in <module>

  File "/tmp/pip_build_root/cryptography/setup.py", line 174, in <module>

    "test": PyTest,

  File "/usr/local/lib/python2.7/distutils/core.py", line 112, in setup

    _setup_distribution = dist = klass(attrs)

  File "build/bdist.linux-x86_64/egg/setuptools/dist.py", line 260, in __init__

  File "build/bdist.linux-x86_64/egg/setuptools/dist.py", line 285, in fetch_build_eggs

  File "build/bdist.linux-x86_64/egg/pkg_resources.py", line 631, in resolve

  File "build/bdist.linux-x86_64/egg/pkg_resources.py", line 871, in best_match

  File "build/bdist.linux-x86_64/egg/pkg_resources.py", line 883, in obtain

  File "build/bdist.linux-x86_64/egg/setuptools/dist.py", line 335, in fetch_build_egg

  File "build/bdist.linux-x86_64/egg/setuptools/command/easy_install.py", line 595, in easy_install

  File "build/bdist.linux-x86_64/egg/setuptools/command/easy_install.py", line 625, in install_item

  File "build/bdist.linux-x86_64/egg/setuptools/command/easy_install.py", line 822, in install_eggs

  File "build/bdist.linux-x86_64/egg/setuptools/command/easy_install.py", line 1028, in build_and_install

  File "build/bdist.linux-x86_64/egg/setuptools/command/easy_install.py", line 1016, in run_setup

distutils.errors.DistutilsError: Setup script exited with error: command 'gcc' failed with exit status 1

----------------------------------------
Cleaning up...
Command python setup.py egg_info failed with error code 1 in /tmp/pip_build_root/cryptography
Storing debug log for failure in /root/.pip/pip.log

Solution :

c/_cffi_backend. c:truth:error:ffi. h:No such file or directory
Install the libffi-devel package
yum install libffi-devel

JAVA ERROR: JDWP Unable to get JNI 1.2 environment, jvm->GetEnv() return code = -2 JDWP exit erro

When running the program is suddenly the following exception occurs

ERROR: JDWP Unable to get JNI 1.2 environment, jvm->GetEnv() return code = -2
JDWP exit error AGENT_ERROR_NO_JNI_ENV(183):  [util.c:840]

The reason:

1.JDK1.6.1
2. There is an error in the last debugging code, which causes the process not to terminate and take up the Console output, and such error occurs when starting debugging later.

Solutions:

At the end of the program, the main() function adds: System.exit(0);
System.exit(0); will cause the program to be terminated immediately, and if there are threads in the program that are still executing tasks, subsequent tasks will not be able to continue.