Tag Archives: IDEA

[Solved] Idea service startup error: no buffer space available (maximum connections reached): the solution of connect.

Error message.
Severe : Error starting endpoint
java.io.IOException: Unable to establish loopback connection
at sun.nio.ch.PipeImplInitializer.run(PipeImpl.java:106)atjava.security.AccessController.doPrivileged(NativeMethod)atsun.nio.ch.PipeImpl.&lt;init>(PipeImpl.java:122)atsun.nio.ch.SelectorProviderImpl.openPipe(SelectorProviderImpl.java:27)atjava.nio.channels.Pipe.open(Pipe.java:133)atsun.nio.ch.WindowsSelectorImpl.&lt;init>(WindowsSelectorImpl.java:104)atsun.nio.ch.WindowsSelectorProvider.openSelector(WindowsSelectorProvider.java:26)atjava.nio.channels.Selector.open(Selector.java:209)atorg.apache.tomcat.util.net.NioEndpoint Initializer.run(PipeImpl.java:106) at java.security.AccessController.doPrivileged(Native Method) at sun.nio.ch.PipeImpl.&lt;init&>(PipeImpl.java:122) at sun.nio.ch.SelectorProviderImpl.openPipe(SelectorProviderImpl.java:27) at java.nio.channels.Pipe.open(Pipe.java:133) at sun.nio.ch.WindowsSelectorImpl.&lt;init&>(WindowsSelectorImpl.java:104) at sun.nio.ch.WindowsSelectorProvider.openSelector(WindowsSelectorProvider.java:26) at java.nio.channels.Selector.open(Selector.java:209) at org.apache.tomcat.util.net.NioEndpointInitializer.run(PipeImpl.java:106)atjava.security.AccessController.doPrivileged(NativeMethod)atsun.nio.ch.PipeImpl.<init>(PipeImpl.java:122)atsun.nio.ch.SelectorProviderImpl.openPipe(SelectorProviderImpl.java:27)atjava.nio.channels.Pipe.open(Pipe.java:133)atsun.nio.ch.WindowsSelectorImpl.<init>(WindowsSelectorImpl.java:104)atsun.nio.ch.WindowsSelectorProvider.openSelector(WindowsSelectorProvider.java:26)atjava.nio.channels.Selector.open(Selector.java:209)atorg.apache.tomcat.util.net.NioEndpointPoller.(NioEndpoint.java:1472)
at org.apache.tomcat.util.net.NioEndpoint.start(NioEndpoint.java:929)
at org.apache.coyote.http11.Http11NioProtocol.start(Http11NioProtocol.java:168)
at org.apache.catalina.connector.Connector.start(Connector.java:1220)
at org.apache.catalina.core.StandardService.start(StandardService.java:540)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:759)
at org.apache.catalina.startup.Catalina.start(Catalina.java:595)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Caused by: java.net.SocketException: No buffer space available (maximum connections reached?): connect
at sun.nio.ch.Net.connect(Native Method)
at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:532)
at java.nio.channels.SocketChannel.open(SocketChannel.java:146)
at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:78)
… 20 more
2018-8-20 10:00:21 org.apache.catalina.core.Sta

This is part of the error message, and there is a large string in front of it that is omitted here.

Solution.
This problem has been bothering me for a long time. As soon as tomcat starts, it starts reporting this error. The site could not be accessed. Many people on the Internet said to close the firewall or something, reinstall jdk what have tried, useless. In fact, a careful look at the error log, said: No buffer space available Think about what should be the window in the large link is not closed to cause a lack of space. Check, sure enough, the process is over, but still after a lot of TIME_WAIT state connections are not released, and then check all the time_wait connections.

Solution process.
1. cmd->regedit Enter the registry

2. Go to HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Services/Tcpip/Parameters

3. Create a new DWORD type of registry entry, named: MaxUserPort

4. value data (double-click MaxUserPort prompt to enter the value): 60000 (entered in decimal format, the valid range of this value is 5000-65534)

5. Create a new DWORD type registry entry named: TCPTimedWaitDelay

6. value data: 30 (automatic disconnection time of TIME_WAIT, the default is 4 minutes).

Through the above steps, restart tomcat. problem does not recur, happy ！！！！

Conclusion.
Due to a large number of TIME_WAIT connections not being released, the occupied port resources have not been reclaimed and the problem of insufficient buffer space has arisen, and the application is always automatically disconnected.

About “SQL dialect is not configured.” warning in idea

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Warning about “SQL dialect is not configured.” in idea

Today, in learning the integration of spring and mybatis, we have encountered a situation that we have not encountered before. When writing the XML file, idea gave a warning under my SQL statement: * * SQL dialog is not configured. * * after I checked it repeatedly, I found that it was not the SQL statement

later, it was found that the problem was set in idea

solution: 1. Find Settings

in file of idea; Framework and find sql dialogues

3 in this tab. Set the options in Global SQL dialog and Project SQL dialog on the right to MySQL , and then click apply and OK in turn

after the modification, idea will not warn you, and there is no yellow line under the SQL statement

IDEAUnable to open debugger port (127.0.0.1:51112): java.net.SocketException “socket closed”

This error is usually caused by the port being occupied

Solution 1: change the port in Tomcat parameter configuration

Solution 2: end the process occupying the port

CMD open command line window

Netstat – aon|findstr “1099” query the process occupying port 1099

Taskkill – F – PID 808 closes the process with PID 808

Idea failed to start: failed to create JVM

The reason is that the configuration idea memory setting is too large, and it is invalid to modify the idea64.exe.vmoptions in the installation directory

The solution is to open the C disk, user, user name, intellijidea, 018.3, config, idea64.exe, vmoptions file and modify it

Invalid idea to modify the file in the installation directory

idea Failed to clean project Failed to delete target

Failed to execute goal org.apache.maven. plugins:maven-clean-plugin :2.5:clean (default-clean) on project aaa: Failed to clean project: Failed to delete D:\IdeaProjects\aaa\target -> [ Help 1]

When packing through maven, the target file will be prompted to be occupied when cleaning

resolvent:

 
In the start search box, enter “resource monitor” to open the resource monitor, as shown in the following figure:

 

In this window, switch to the CPU tab, enter the file name (target) in the associated handle, and press enter to find the occupied process

Right click to end the process. ok

Error:java: Compilation failed: internal java compiler error

1、Check the jdk of the project（Ctrl+Alt+shift+S）
File ->Project Structure->Project Settings ->Project

2.View the jdk of the project (Ctrl+Alt+shift+S)
File -> Project Structure-> Project Settings -> Modules -> (name of the project to be modified) -> Sources ->

3.View Java configuration in idea
File ->Setting ->Build,Execution,Deployment -> Compiler -> Java Compiler

If the above three steps still fail
Clear IDEA cache and restart IDEA
File->Invalidate Caches/Restart