Memory Leak Overview

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Solving NoClassDefFoundError using the classloader analysis tool (CAT)

javax.servlet.ServletException: java.lang.NoClassDefFoundError: Application was failing to find an application class. Using jarscan we searched the jars containing this class from the middleware home. The jars were present in the domain lib. We also checked the classpath in the startWeblogic.cmd and setDomainEnv.cmd to check if direct references were present in the

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trimDirectiveWhitespaces not working?

You need to change the web-app version to 2.5 ¬†as previous version does not support JSP 2.1. Weblogic server enforces the jsp version mentioned in the web-app of the web.xml.   It should be like this. <web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.5" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_5.xsd">   I have uploaded a sample application which

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SSL Overview and troubleshooting tips

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Mutual Authentication with Weblogic Server

Mutual authentication is a process in which the Server sends its certificate to the client ( thin client / fat client) and the client validates the certificates, then the server requests for a certificate from the client and validates it. In this example we have created a .pfx certificate which

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Weblogic Server Stuck thread and very high cpu usage when executing a query

We were observing frequent server hangs. On taking thread dumps at the time of hang we found the following culprit thread. [STUCK] ExecuteThread: ‘6’ for queue: ‘weblogic.kernel.Default (self-tuning)’” daemon prio=1 tid=01baae30 nid=55 lwp_id=9965842 runnable [1ff05000..1ff03878] at oracle.jdbc.oci8.OCIDBAccess.do_fetch(Native Method) at oracle.jdbc.oci8.OCIDBAccess.executeFetch(OCIDBAccess.java:1758) – locked < 36582dd0> (a oracle.jdbc.oci8.OCIDBAccess) at oracle.jdbc.driver.OracleStatement.doExecuteQuery(OracleStatement.java:2659) at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:2832)

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Weblogic STUCK Thread on executing query on MS SQL Server 2008

Stuck threads were observed on Weblogic Server. Thread was stuck at this point. at java.net.SocketInputStream.socketRead0(Native Method) at java.net.SocketInputStream.read(SocketInputStream.java:129) at com.microsoft.sqlserver.jdbc.TDSChannel.read(IOBuffer.java:1579) at com.microsoft.sqlserver.jdbc.TDSReader.readPacket(IOBuffer.java:3730) – locked (a com.microsoft.sqlserver.jdbc.TDSReader) at com.microsoft.sqlserver.jdbc.TDSCommand.startResponse(IOBuffer.java:5321) at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement.doExecutePreparedStatement(SQLServerPreparedStatement.java:388) at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement$PrepStmtExecCmd.doExecute(SQLServerPreparedStatement.java:340) at com.microsoft.sqlserver.jdbc.TDSCommand.execute(IOBuffer.java:4874) at com.microsoft.sqlserver.jdbc.SQLServerConnection.executeCommand(SQLServerConnection.java:1400) – locked (a java.lang.Object) at com.microsoft.sqlserver.jdbc.SQLServerStatement.executeCommand(SQLServerStatement.java:179) at com.microsoft.sqlserver.jdbc.SQLServerStatement.executeStatement(SQLServerStatement.java:154) at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement.executeQuery(SQLServerPreparedStatement.java:283) After some analysis on

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Configuring SSL on Weblogic Server using WLST Script

Create a certs folder in your C Drive and copy the setWLSEnv.cmd from your WL_HOME\bin to this location. Run the script from the command line to set the environment. C:\certs>setWLSEnv.cmd Generate Key Pair C:\certs>keytool -genkey -alias mykey -keyalg RSA -keysize 1024 -dname “CN=local host, OU=Customer Support, O=BEA Systems Inc, L=Denver,

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Tuning Weblogic Server

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Analyzing memory leak on Weblogic Server

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