Error Message:
org.eclipse.team.svn.core.connector.SVNConnectorException: svn: E175002: SSL handshake failed: 'The server selected protocol version TLS10 is not accepted by client preferences [TLS13, TLS12]'
Solution:
Open Eclipse Setting:
Preference->Version Control(Team)->SVN
Check [SVN Connector] on the right tab
Inside the SVN Connector dropdown box to change an option, I am choosing Native Java HL 1.8… The problem was solved.
Tomcat Startup Error:
When reviewing Java Web, I want to make my workspace cleaner, so I cleaned up the web projects left in the Tomcat installation directory webapps, and double-click start Bat file, the CMD window flashes by, and I feel strange at once. This situation is usually JAVA_Home environment variable is not configured correctly.
Then open start.bat in text mode, add “pause” after the end statement at the end, and double-click start.bat again after saving, the following results appear:
It is found that the paths are correct, indicating that there is no problem with my environment variable configuration.
Open start.bat again as text, call call "%EXECUTABLE%" start %CMD_LINE_ARGS% statement is changed to run. After saving, double-click start.bat, the following message appears:
A series of errors are shown later, and I only cut one illustratively.
The main information observed is that the sub-container failed to start, and a specified resource set is invalid. The service component necessary Catalina.start fails to start; When you look carefully, you find that it shows an invalid resource set path (at the end of the figure above). You can see that there is no relevant folder under this path.
So I looked at the server.xml file in the conf directory and saw the following configuration (only the code was intercepted):
<Service name="Catalina">
<Engine defaultHost="localhost" name="Catalina">
<Host appBase="webapps" autoDeploy="true" name="localhost" unpackWARs="true">
<Context docBase="E:apache-tomcat-9.0.20webappsSSM" path="/SSM" reloadable="true" source="org.eclipse.jst.jee.server:SSM"/>
<Context docBase="E:apache-tomcat-9.0.20webappsSpring" path="/Spring" reloadable="true" source="org.eclipse.jst.jee.server:Spring"/>
<Context docBase="E:apache-tomcat-9.0.20webappsPressRelease" path="/PressRelease" reloadable="true" source="org.eclipse.jst.jee.server:PressRelease"/>
</Host>
</Engine>
</Service>
In the Context tag, docBase specifies the path of the project, which is accessed through the virtual path path. Because I deleted these three folders together when cleaning the project before, there was an error when Tomcat started.
Delete the contents of the three Context tags in the server.xml file, double-click start.bat after saving, and find that Tomcat has started normally and can access port 8080;
Or create the corresponding SSM, Spring, and PressRelease folders in the webapps directory, and Tomcat can also be started normally.
Cause of the problem: since the so file is a binary file, it is ignored by default. You need to modify the configuration before uploading
Solution:
find / -name .subversion # find SVN configuration file path
cd to find the path of .subversion
VIM config finds these two lines:
#global-ignores = *.o *.lo *.la *.al .libs *.so *.so.[0-9]* *.a *.pyc *pyo
# *.rej *~#*# .#* .*.swp.DS_StoreModified as:
###global-ignores = *.o *.lo *.la *.al .libs *.so *.so.[0-9]* *.a *.pyc *pyo
### *.rej *~#*# .#* .*.swp.DS_Store
global-ignores = .*.swp.DS_StoreIt can be solved after saving!
It can be understood that the dependency failed, and the dependency could not be found
Some errors are reported as follows:
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'pageService': Unsatisfied dependency expressed through field 'pageInfoMepper'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'pageInfoMepper' defined in file [D:projectIDEAProjectdemoPageoutartifactsWEB-INFclassescomligleimapperPageInfoMepper.class]: Cannot resolve reference to bean 'sqlSessionFactory' while setting bean property 'sqlSessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in file [D:projectIDEAProjectdemoPageoutartifactsWEB-INFclassesapplicationContext.xml]: Invocation of init method failed; nested exception is org.springframework.core.NestedIOException: Failed to parse config resource: class path resource [mybatis-config.xml]; nested exception is org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: org.apache.ibatis.builder.BuilderException: Error resolving class. Cause: org.apache.ibatis.type.TypeException: Could not resolve type alias 'com.github.pagehelper.PageInterceptor'. Cause: java.lang.ClassNotFoundException: Cannot find class: com.github.pagehelper.PageInterceptor
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:596)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:90)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:374)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1411)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:592)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:843)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549)
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:400)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:291)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:103)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4643)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5109)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:743)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:719)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:703)
at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1737)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:287)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:457)
at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:406)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:287)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
at com.sun.jmx.remote.security.MBeanServerAccessController.invoke(MBeanServerAccessController.java:468)
at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1468)
at javax.management.remote.rmi.RMIConnectionImpl.access$300(RMIConnectionImpl.java:76)
.......
.......
Solution:
1. First, see if the annotation on the Service layer class is added or wrong, it should be @Service, whether the annotation refers to the Spring class, do not import it into another package, and see the path of the package.
2. Also, if the Service layer is divided into interfaces and implementation classes, see if the implementation class is annotated (@Service), and see if there is an implementation class.
3. Take a look at the configuration file. xml, is there any package where the automatic scan service is started?
<context:component-scan base-package="com.liglei.service"></context:component-scan>
4. Check if the jar package is downloaded completely and if there is this jar package
5. Just to see if there are any packages in the red box in the figure below that have not been imported, and if so, follow the steps below:
File–> Project Structure–> Artifacts–> Right click demopage –> Put into Output Root–> OK
Make sure the above steps are OK. Restart the project and try again~
The following problems occurred when logging on the server today:
Phenomenon
1. Remote CRT login
[root@fast70 ~]# vim /etc/security/limits.d/20-nproc.conf
# Default limit for number of user's processes to prevent
# accidental fork bombs.
# See rhbz #432903 for reasoning.
* soft nproc 65535
root soft nproc unlimited
2. You can log in from other accounts. There is no problem to view the process and load on top
switch to root, and then switch to the fast account
[ root@fast70 ~]# su – fast
last login: May 12 00:32:45 CST 2020 from 192.168.0.9pts/2
Su: warning: cannot change to/home/fast Directory: there is no file or directory
Su: failed to execute/bin/bash: the resource is temporarily unavailable
Solution:
enter the root user
Modify /etc/security/limits.d/20-nproc.conf
expand the maximum value of * user connection (4096 -> 65535)
[root@fast70 ~]# vim /etc/security/limits.d/20-nproc.conf
# Default limit for number of user's processes to prevent
# accidental fork bombs.
# See rhbz #432903 for reasoning.
* soft nproc 65535
root soft nproc unlimited
After modification, remote login and account switching can be used normally
however, I always feel that the root cause has not been found. It must be related to resource occupation, but I can’t find the specific location
I have contacted watchdog to kill the process several times before. I doubt that it is still a symptom rather than a root cause
Linux deploys the WebService service and starts the error bindexception: cannot assign requested address
code
Question
The windows local test is normal. When it is deployed to the Linux server, an error is reported when it is started: BindException: Cannot assign requested address
Cause of problem
There is a problem with the IP in the URL. If Alibaba cloud and other cloud servers are used, you need to check the address of the network card eth0, and then change the IP in the URL to the IP of eth0
if not, check whether the IP of eth0 is configured or not in /etc/hosts. If not, add: IP + hostname
if you do not know the hostname, you can use the hostname command to check. If not, vim /etc/hosts, and then insert the data: IP hostname. Note that there is a space in the middle
Finally, when accessing WebService, the service can be accessed through public IP
Environment: Center OS 7.6 virtual machine
Log error: kernel: BLK_ update_ request: I/O error, dev fd0, sector 0
Query the error information and find that there may be no floppy disk, and the floppy disk drive is loaded when the system is started.
Verification: lsmod | grep float
Step 1: (Not Work)
Try creating nofloppy.conf in the /etc/modprobe.d/ directory to disable the floppy module from loading on boot
vim /etc/modprobe.d/blacklist.conf
#Add command line
blacklist floppy
Or
echo "blacklist floppy" | tee /etc/modprobe.d/blacklist-floppy.conf reboot
Step 2: The use of blacklist does not disable the way, and finally choose to add the following code in grub to boot disable
vim /boot/grub2/grub.cfg #Add code modprobe.blacklist=floppy #Disable floppy drive reboot
After rebooting and checking the logs, no errors were reported.
Background
Error in compiling MSOffice encryption binary file on Debian 10 server
GitHub address: https://github.com/herumi/msoffice
report errors:
root@e0fef8daa858:/var/www/msoffice# make -j RELEASE=1
/usr/bin/make -C src
make[1]: Entering directory '/var/www/msoffice/src'
g++ -c msoffice-crypt.cpp -o release/msoffice-crypt.o -g -D_FILE_OFFSET_BITS=64 -msse2 -fno-operator-names -Wall -Wextra -Wformat=2 -Wcast-qual -Wcast-align -Wwrite-strings -Wfloat-equal -Wpointer-arith -Ofast -fomit-frame-pointer -DNDEBUG -march=native -msse4 -I/var/www/msoffice/include -I/var/www/msoffice/../cybozulib/include -I/var/www/msoffice/../mie/include
g++ -c attack.cpp -o release/attack.o -g -D_FILE_OFFSET_BITS=64 -msse2 -fno-operator-names -Wall -Wextra -Wformat=2 -Wcast-qual -Wcast-align -Wwrite-strings -Wfloat-equal -Wpointer-arith -Ofast -fomit-frame-pointer -DNDEBUG -march=native -msse4 -I/var/www/msoffice/include -I/var/www/msoffice/../cybozulib/include -I/var/www/msoffice/../mie/include
In file included from /var/www/msoffice/include/decode.hpp:14,
from msoffice-crypt.cpp:16:
/var/www/msoffice/../cybozulib/include/cybozu/crypto.hpp:30:10: fatal error: openssl/hmac.h: No such file or directory
30 | #include <openssl/hmac.h>
| ^~~~~~~~~~~~~~~~
compilation terminated.
make[1]: *** [../common.mk:57: release/msoffice-crypt.o] Error 1
make[1]: *** Waiting for unfinished jobs....
In file included from /var/www/msoffice/include/attack.hpp:14,
from attack.cpp:14:
/var/www/msoffice/../cybozulib/include/cybozu/crypto.hpp:30:10: fatal error: openssl/hmac.h: No such file or directory
30 | #include <openssl/hmac.h>
| ^~~~~~~~~~~~~~~~
compilation terminated.
make[1]: *** [../common.mk:57: release/attack.o] Error 1
make[1]: Leaving directory '/var/www/msoffice/src'
make: *** [Makefile:7: all] Error 2
Solution:
To solve this problem, you need to install the OpenSSL development package, execute the following command to install it, and then recompile it
apt update && apt install libssl-dev
If it is CentOS, you can execute the following command to solve the problem
yum install openssl-dev -yProblem description
A virtual machine that has been running normally. After a shutdown and restart, it is found that SSH cannot connect
Restart network discovery failed
service networkrestart
Solution:
[root@lexsaints ~]#systemctl stop NetworkManager
[root@lexsaints ~]#systemctl disable NetworkManager
[root@lexsaints ~]#systemctl restart network
or
[root@lexsaints ~]#systemctl restart NetworkManager
[root@lexsaints ~]#systemctl restart networkCause of problem
NetworkManager is a program that detects the network and automatically connects to the network.
Whether it’s wireless or wired, it makes it easy for you to manage.
For wireless networks, the network manager can automatically switch to the most reliable wireless network.
The program using the network manager can freely switch between online and offline modes.
The network manager can preferentially select wired network and support VPN.
The network manager was originally developed by RedHat and is now managed by gnome.
Error running tomcat8: Address localhost:80 is already in use
1. Problems
Tomcat startup error: Error running tomcat8: Address localhost:80 is already in use
2. Solution
2.1 port 8080 is modified
Modify the server.xml file in E:\software\apache-tomcat-8.5.81\conf back.
Problem Description: start to execute OpenSSL and report an error:
openssl
openssl: error while loading shared libraries: libcrypto.so.1.0.0: cannot open shared object file: No such file or directoryThen find the corresponding file through the search instruction, and soft connect it
find/-name libcrypto.so.1.0.0 find files
/opt/acb/lib/libcrypto.so.1.0.0 search the outcome
ln -s libcrypto.so.1.0.0 /usr/lib64/ soft connectHowever, it is found that the implementation of OpenSSL still reports errors, as follows
openssl
openssl: error while loading shared libraries: libcrypto.so.1.0.0: cannot open shared object file: Error 40Check libcrypto.so.1.0.0 that reported error, and find that libcrypto.so.1.0.0 is also a soft connection
lrwxrwxrwx 1 splunk root 15 Jan 9 2020 libssl.so -> libssl.so.1.0.0
-r-xr-xr-x 2 splunk root 485304 Jan 9 2020 libssl.so.1.0.0The solution is to connect the source file directly and solve the problem
ln -s libcrypto.so /usr/lib64/libcrypto.so.1.0.0error while loading shared libraries: libjson.so.0: cannot open shared object file: No such file or
Solution:
sudo vim /etc/ld.so.confAdd /usr/local/lib to the file, which is the path is libjson.so.0 located
include /etc/ld.so.conf.d/*.conf
/usr/local/lib
Finally, the terminal inputs sudo ldconfig