tomcat troubleshooting

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Zabbix monitoring tomcat troubleshooting with "Connection refused to host: 127.0.0.1"

Zabbix monitoring tomcat troubleshooting with "Connection refused to host: 127.0.0.1"Zabbix monitors tomcat for "Connection refused to host: 127.0.0.1" fault resolution Description A tomcat monitored by jmx suddenly fails to collect data, which is very strange! Because other tomcat

Learn Java--tomcat installation and common error Troubleshooting (ZZ) starting from 0

server 2014-05-17 is running.  Open the Catalina.2014-05-17.log file to see the log information inside,  Log information is clearly recorded in the operation of the Tomcat server, if the 8080 port is occupied and can not start properly, the exception is recorded as shown in the information, by looking at the exception information, we can know why the Tomcat server can not start properly!Summary: When the

TOMCAT/JVM performance Optimization (also PermGen troubleshooting)

%catalina_home%/bin/catalina.bat in accordance with the online method. After set java_opts=%java_opts%-server-xx:permsize=128m-xx:maxpermsize=256m, debug startup is invalid, In fact, this time Tomcat is called Tomcat7.exe boot, so the parameters in the Catalina.bat can not be effective. The correct way is to add the optional Java VM arguments to the JDK, Tomcat---x.x, Servers, MyEclipse-i-Preferences-xx:per

Record the tomcat troubleshooting process

string value"${db1.driver}"found that the Web root of the spring-datasource.xml inside the db1.driver is not defined, with the development of this problem, commented out this part of the code will be able to access the normal.Note: Server.xml contains information about the logs configuration, as follows:prefix= "Localhost_access_log" suffix= ". txt"pattern= "%h%l%u%t quot;%rquot; %s%b "/>The default is on, a separate log is generated every day, for example: Localhost.2016-05-22.log, this piece

Troubleshooting tomcat not booting and MySQL unreachable for cloning machines

In the process of cloning a server into a test environment during a production, it is found that the relevant network configuration after cloning has been modified to the test environment, but it is reported that the following error occurred after Tomcat startup:Severity: standardserver.await:create[localhost:8021]:By troubleshooting Discovery/etc/hosts, the original IP address is bound, and the test addres

The server option was not found when troubleshooting eclipse configuration Tomcat

The server option was not found when integrating Eclipse and Tomcat:Follow the online steps below:In Eclipse, Windows (window)--preferences (preferences)--server--Runtime environment (runtime environments)--add (add) to the Tomcat server. The version of Tomcat that corresponds to the installation chooses Apache Tomcat v6.0. Next, select the previous

The server option was not found when troubleshooting eclipse configuration Tomcat

The server option was not found when integrating Eclipse and Tomcat:Follow the online steps below:In Eclipse, Windows (window)--preferences (preferences)--server--Runtime environment (runtime environments)--add (add) to the Tomcat server. The version of Tomcat that corresponds to the installation chooses Apache Tomcat v6.0. Next, select the previous

Troubleshooting the Tomcat data connection pool cannot be freed

compromised. This mechanism is triggered at (Getnumidle () Example: When maxactive=20, active connection is 18, idle connection is 1 can trigger "removeabandoned". However, active connections are deleted only if they are not used for more than "Removeabandonedtimeout". The default is 300 seconds. Travels in ResultSet are not counted as being used.Logabandoned=true, after the event, will be in the log to print out the recovery of connection error message, including where to use the connection bu

Troubleshooting of Tomcat filter exception shielding

Author: fbysssMSN: jameslastchina@hotmail.comBlog: blog.csdn.net/fbysssDisclaimer: This article is original from fbysss. for reprinting, please indicate the sourceKeyword: Tomcat filter exceptionBackground: The implementation project is running under tomcat5.02, and everything is normal. The development environment uses tomcat5.5. There are no other problems, but the file upload error is reported:Javax. servlet. servletexception: servlet execution thr

Troubleshooting Server-based Tomcat port occupancy issues

State of the Socket. Since There is no statesinchRaw mode andUsually no states usedinchUDP, this column is Leftblank. Normally this can One ofSeveral values:establishedtheSocketFa= anEstablished connection. Syn_senttheSocketis actively attempting toEstablishaConnection. SYN_RECVA connection request has been received from theNetwork. Fin_wait1theSocketis closed, and theConnection is shutting down. Fin_wait2connection is closed, and the SocketIs waiting for aShutdown from theRemote end.Time

Tomcat start error: Server:error listenerstart troubleshooting process record

Tomcat with Error:To troubleshoot this issue, you first need to adjust the Tomcat log level to the way you can record the log through log4j, in the following ways:http://tomcat.apache.org/tomcat-7.0-doc/logging.html#Using_Log4jAfter adjusting as required, the error message is displayed:Understanding: It is possible that the Log4j.properties configuration file is

Linux/centos Troubleshooting Tomcat Memory Overflow

-xx:survivorratio=2 survivor pool is 2 by default. If garbage collection becomes a bottleneck, you can try customizing the build pool settings-xx:newsize the initial size of the newly generated pool. The default value is 2M.-xx:maxnewsize the maximum size of the newly generated pool. The default value is 32M.+xx:aggressiveheap lets the JVM ignore the xmx parameter, frantically eats a g of physical memory and eats a G swap.-XSS stack size per thread-VERBOSE:GC Reality Garbage Collection Informati

Jbpm4.4 deployment to Tomcat 6 troubleshooting

(StrutsPrepareAndExecuteFilter.java:88) org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76) The reason is that the three jar packages (juel. jar, WEB-INF, juel-engine.jar) and Jar package (el-api.jar) Conflict in tomcat6 lib Solution: Copy the three juel. jar, juel-engine.jar, and juel-impl.jar packages to the tomcat6 Lib, And delete

Tomcat Linux does not log the error troubleshooting

After the investigation, it is found that the log component inside the project is Logback, and slf4j is an implementation way. The valid logs are shown below. Log4j:warn No Appenders could is found for logger (org.springframework.web.context.ContextLoader). Log4j:warn Initialize the log4j system Properly.log4j:WARN see http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info . Slf4j:class path contains multiple slf4j bindings. Slf4j:found Binding in [jar:file:/home/app/tomcat_m/webapp

Troubleshooting Tomcat Servers

Failure phenomenaAccess to the Tomcat server through the browser Discovery server is not responding.Problem analysis CheckThe login server found that the Tomcat server was not down and the service was still there.Using the JPS command, look at the process ID of Tomcat and, after getting the process ID, use theJstack-l pid > Dump.txtExport the

Troubleshooting of Tomcat startup timeout in eclipse

The specific phenomenon is that when eclipse starts tomcat, it will report an error: "timeout waiting for Tomcat v6.0 server @Localhost to start. server did not start after 45s "error. This problem is more likely to occur especially in debug.According to the error message, the startup of Tomcat is terminated because the startup time exceeds 45 MB. This problem ma

Troubleshooting of high load caused by Tomcat restart

A product receives a CPU alarm every time it restarts Tomcat. the CPU usage can reach 80% ~ More than 90%, will continue to fall back for a period of time (the specific time was not investigated ). Analyze and locate the problem as required by the product team. Because online products cannot be restarted at will, they are used in the problem locating phase... "/> Cause of high load:Monitor the resource usage during restart, and analyze the thread stac

Troubleshooting for the Tomcat memecached session sharing synchronization problem

Event Reason: A main project "diagram of the United States", another sub-function is the brand's entry function, is a separate project with the main project, in order to share the user information login, and realize session sharing, two Tomcat, a tomcat6, a tomcat7Sharing the session under the Windows System for Web projectsFirst step:In the two Tomcat context.xml this file is configured with the following

Troubleshooting Tomcat does not start the problem-----collection

1, installed on the machine tomcat5.0, then found that Tomcat can not start. View Tomcat logs [2008-03-17 16:02:20] [174 JAVAJNI.C] [ERROR] could not find the specified module. [2008-03-17 16:02:20] [986 PRUNSRV.C] [ERROR] Failed creating Java c:/program Files/java/jdk1.6.0/jre/bin/server/jvm.dll [2008-03-17 16:02:20] [1260 PRUNSRV.C] [ ERROR] Servicestart returned 1 have been tinkering for a while, or

Troubleshooting for the Tomcat memecached session sharing synchronization problem

Sharing the session under the Windows System for Web projectsFirst step:In the two Tomcat context.xml this file is configured with the following code:Memcachednodes= "n1:127.0.0.1:11211"Lockingmode= "Auto"Sticky= "true"Requesturiignorepattern= ". *\. (ICO|PNG|GIF|JPG|CSS|JS) $ "Sessionbackupasync= "false"sessionbackuptimeout= "100"Transcoderfactoryclass= "De.javakaffee.web.msm.serializer.kryo.KryoTranscoderFactory"Copycollectionsforserialization= "tru

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