Category Archives: How to Fix

Error in idea unit test command line is too long

Question

Recently, I changed the computer and reconfigured the development environment. During unit testing, I found that the idea reported an error

Error running '*******Test.******' 
Command line is too ling. Shorten command line for ******* or also for JUnit default configuration.

Solution

Edit the workspace.xml tag under the project. Idea

<component name=“PropertiesComponent”>

Add next

<property name="dynamic.classpath" value="true" />

The remote port occupation of Linux startup jar package script reports an error 

PATH=$PATH:$JAVA_HOME/bin
NAME=$1
VERSION=$2
PORT=$3
echo $NAME
ID=`ps -ef | grep "$NAME" | grep -v "$0" | grep -v "grep" | awk '{print $2}'`
for id in $ID
do
kill -9 $id
echo "killed $id"
done
nohup java -server -Xms600m -Xmx600m -Xmn256m -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=256m -Xverify:none -XX:+DisableExplicitGC 
-Djava.awt.headless=true -Xdebug -Xrunjdwp:server=y,transport=dt_socket,address=$PORT,suspend=n -Duser.timezone=Asia/Shanghai 
-Denv=fat -Dapollo.cluster=vmfat03 -jar $NAME-$VERSION.jar  > $NAME.log 2>&1 &

  The script is shown in the figure, which is a very common one. However, if I add a remote port when I start, an error will be reported when I run the script next time

ERROR: transport error 202: bind failed: Address already in use
ERROR: JDWP Transport dt_socket failed to initialize, TRANSPORT_INIT(510)
JDWP exit error AGENT_ERROR_TRANSPORT_INIT(197): No transports initialized [debugInit.c:750]

The remote port is occupied, but I have obviously killed the process, and the command query has also been killed.

After guessing whether it will take some time for the remote connection port to close completely after killing the process, but at this time, you use the same port number to start the remote debug mode, which will lead to the error shown in the figure above, so I’ll sleep 1 behind the done in the script. Let him wait 1s.

The result proved that the conjecture was correct, and then no such error was reported

Spring MVC error HTTP status 400 – bad request

When the type of the requested parameter is correct and various configurations are correct, a 400 error will appear, and the console will report an error failed to convert value of type ‘Java. Lang. string’ to required type ‘Java. Lang. Integer’; Nested exception is java.lang.numberformatexception: for input string: “XXX”] a similar error may be that the request path set by your control layer and the path of static resources have the same name,
For example:
the page I visit is/user/index.html
and the requestmapping (“user”) of the control layer

when accessing/user/index.html, the user request of the servlet will be followed, and the parameter type may not be correct, which will be 400.
if the correct estimation directly returns the requested JSON result,

HBase hangs up immediately after startup. The port reports an error of 500 and hmaster aborted

[error 1]:

java.lang.RuntimeException: HMaster Aborted
	at org.apache.hadoop.hbase.master.HMasterCommandLine.startMaster(HMasterCommandLine.java:261)
	at org.apache.hadoop.hbase.master.HMasterCommandLine.run(HMasterCommandLine.java:149)
	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:76)
	at org.apache.hadoop.hbase.util.ServerCommandLine.doMain(ServerCommandLine.java:149)
	at org.apache.hadoop.hbase.master.HMaster.main(HMaster.java:2971)
2021-08-26 12:25:35,269 INFO  [main-EventThread] zookeeper.ClientCnxn: EventThread shut down for session: 0x37b80a4f6560008

[attempt 1]: delete the HBase node under ZK
but not solve my problem
[attempt 2]: reinstall HBase
but not solve my problem
[attempt 3]: turn off HDFS security mode

hadoop dfsadmin -safemode leave

Still can’t solve my problem
[try 4]: check zookeeper. You can punch in spark normally or add new nodes. No problem.

Turn up and report an error
[error 2]:

master.HMaster: Failed to become active master
org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.ipc.StandbyException): Operation category READ is not supported in state standby. Visit https://s.apache.org/sbnn-error
	at org.apache.hadoop.hdfs.server.namenode.ha.StandbyState.checkOperation(StandbyState.java:108)
	at org.apache.hadoop.hdfs.server.namenode.NameNode$NameNodeHAContext.checkOperation(NameNode.java:2044)
	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkOperation(FSNamesystem.java:1409)
	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getFileInfo(FSNamesystem.java:2961)
	at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.getFileInfo(NameNodeRpcServer.java:1160)
	at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.getFileInfo(ClientNamenodeProtocolServerSideTranslatorPB.java:880)
	at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
	at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:507)
	at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1034)
	at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:1003)
	at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:931)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:422)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1926)
	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2854)

Here’s the point: an error is reported that my master failed to become an hmaster. The reason is: operation category read is not supported in state standby. That is, the read operation fails because it is in the standby state. Check the NN1 state at this time

#  hdfs haadmin -getServiceState nn1

Sure enough, standby

[solution 1]:
manual activation

hdfs haadmin -transitionToActive --forcemanual nn1

Kill all HBase processes, restart, JPS view, access port

Bravo!!!

It’s been changed for a few hours. It’s finally good. The reason is that I forgot the correct startup sequence
zookeeper —— & gt; hadoop——-> HBase
every time I start Hadoop first, I waste a long time. I hope I can help you.

JetBrains compilation error is due to project language level

This is described in the user manual of JetBrains. Project language level

It has two functions:

    check syntax compatibility when writing code. For example, if it is set to 7, you can’t use the features above jdk1.7 when writing code, no matter what version of JDK you use. Features like functional interfaces cannot be used, and the idea will prompt an error. Compile the source code to the bytecode of the target version. For example, if it is set to 6, the compiled code is JDK6 compatible regardless of whether JDK7 or 8 is used

     

Java uses Netease mailbox 163 to send an error message 


Exception in thread "main" javax.mail.MessagingException: Could not connect to SMTP host: smtp.163.com, port: 25;
  nested exception is:
	javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?
	at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:2212)
	at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:722)
	at javax.mail.Service.connect(Service.java:342)
	at javax.mail.Service.connect(Service.java:222)
	at javax.mail.Service.connect(Service.java:243)
	at com.ailpha.aithink.job.controller.email.EmailUtil.deliverWithMime(EmailUtil.java:68)
	at com.ailpha.aithink.job.controller.email.EmailUtil.main(EmailUtil.java:149)

The reason is that the following code is used when SSL is enabled

if (emailConfigModel.getEnSsl() == 0) {
            MailSSLSocketFactory sf = new MailSSLSocketFactory();
            sf.setTrustAllHosts(true);
            prop.put("mail.smtp.ssl.enable", "true");
            prop.put("mail.smtp.ssl.socketFactory", sf);
        }

After searching various data, it is found that the port used when using SSL is port 465, not port 25. If SSL is not used, the port is port 25

Redis compilation error cannot find config.m4

1. First, you can download http://pecl.php.net/package/redis After decompressing the expansion package, it enters the first level for execution

/opt/homebrew/opt/ [email protected] /bin/phpize && amp; \

./configure –with-php-config=/opt/homebrew/opt/ [email protected] /bin/php-config

Please modify it according to your PHP version and the location of phpize.

2. If an error is reported in the first step as follows:

Available for download: https://github.com/phpredis/phpredis/archive/develop.zip

Then proceed to step 1  

Solution to errors reported by TES command in vscode – errors reported by typescript command

    start vscode as an administrator, open the terminal, enter the command get executionpolicy as follows
    , and then enter the command set executionpolicy remotesigned. If it is normal, there is no problem. If an error is reported as follows
    , then enter the command set executionpolicy – scope currentuser
    , and then enter remotesigned at the position shown in the figure