WebLogic 9.2负载平衡问题

我有2个独立的WebLogic 9.2.1服务器（它们是具有自己的管理服务器的托管服务器）的设置。所以没有建立群集。它们使用JDBC会话持久性配置。此外，每个WebLogic服务器都有自己的Apache 2前端，而WebLogic插件仅将流量转发到其各自的WebLogic服务器。在Apache 2服务器之前，我有一个硬件负载平衡器。目前，我们从主持用于会话持久性的表的Oracle数据库中获取约束违规。WebLogic 9.2负载平衡问题

我发现硬件负载平衡器使用粘性IP（因此会话也应该是粘性的）。但它逃脱了我在设置中出了什么问题？

的WebLogic日志：

 
####<Apr 26, 2011 13:00:08.0428 CEST> <Error> <HTTP Session> <sktpens01por02> <SktEnsPorServer1> <[ACTIVE] ExecuteThread: '230' for queue: 'weblogic.kernel.Default (self-tuning)'> <skatGuid=6fa90948-b285-45a5-954b-45e22bfc26c2,ou=company,ou=external,ou=entities,dc=skat,dc=dk> <> <> <1303815608428> <BEA-100087> <The jdbc session data for session id: lZbJN2jTbPZjTf81vSrKytxDdYCpwTgblJhnck3RhTcPf3FQr1Pw ctx:front dblat:1303815595796 triggerLAT:0 has been modified by another server in the cluster. 
java.sql.SQLException: ORA-00001: unique constraint (FRONTSESSIONS.SYS_C0056504) violated 

    at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112) 
    at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:331) 
    at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:288) 
    at oracle.jdbc.driver.T4C8Oall.receive(T4C8Oall.java:745) 
    at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:219) 
    at oracle.jdbc.driver.T4CPreparedStatement.executeForRows(T4CPreparedStatement.java:970) 
    at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1190) 
    at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3370) 
    at oracle.jdbc.driver.OraclePreparedStatement.executeUpdate(OraclePreparedStatement.java:3454) 
    at weblogic.jdbc.wrapper.PreparedStatement.executeUpdate(PreparedStatement.java:128) 
    at weblogic.servlet.internal.session.JDBCSessionData.dbCreate(JDBCSessionData.java:181) 
    at weblogic.servlet.internal.session.JDBCSessionData.dbUpdate(JDBCSessionData.java:242) 
    at weblogic.servlet.internal.session.JDBCSessionData.syncSession(JDBCSessionData.java:583) 
    at weblogic.servlet.internal.session.JDBCSessionContext.sync(JDBCSessionContext.java:232) 
    at weblogic.servlet.internal.ServletRequestImpl$SessionHelper.syncSession(ServletRequestImpl.java:2507) 
    at weblogic.servlet.internal.ServletRequestImpl$SessionHelper.syncSession(ServletRequestImpl.java:2482) 
    at weblogic.servlet.internal.ServletResponseImpl$1.run(ServletResponseImpl.java:1308) 
    at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321) 
    at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121) 
    at weblogic.servlet.internal.ServletResponseImpl.send(ServletResponseImpl.java:1302) 
    at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1368) 
    at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209) 
    at weblogic.work.ExecuteThread.run(ExecuteThread.java:181) 
> 
####<Apr 26, 2011 13:00:08.0436 CEST> <Error> <HTTP Session> <sktpens01por02> <SktEnsPorServer1> <[ACTIVE] ExecuteThread: '230' for queue: 'weblogic.kernel.Default (self-tuning)'> <skatGuid=6fa90948-b285-45a5-954b-45e22bfc26c2,ou=company,ou=external,ou=entities,dc=skat,dc=dk> <> <> <1303815608436> <BEA-100060> <An unexpected error occurred while retrieving the session for Web application: [email protected] - appName: 'Portal-Front', name: 'front', context-path: '/front'. 
java.sql.SQLException: ORA-00001: unique constraint (FRONTSESSIONS.SYS_C0056504) violated 

    at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112) 
    at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:331) 
    at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:288) 
    at oracle.jdbc.driver.T4C8Oall.receive(T4C8Oall.java:745) 
    at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:219) 
    at oracle.jdbc.driver.T4CPreparedStatement.executeForRows(T4CPreparedStatement.java:970) 
    at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1190) 
    at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3370) 
    at oracle.jdbc.driver.OraclePreparedStatement.executeUpdate(OraclePreparedStatement.java:3454) 
    at weblogic.jdbc.wrapper.PreparedStatement.executeUpdate(PreparedStatement.java:128) 
    at weblogic.servlet.internal.session.JDBCSessionData.dbCreate(JDBCSessionData.java:181) 
    at weblogic.servlet.internal.session.JDBCSessionData.dbUpdate(JDBCSessionData.java:242) 
    at weblogic.servlet.internal.session.JDBCSessionData.syncSession(JDBCSessionData.java:583) 
    at weblogic.servlet.internal.session.JDBCSessionContext.sync(JDBCSessionContext.java:232) 
    at weblogic.servlet.internal.ServletRequestImpl$SessionHelper.syncSession(ServletRequestImpl.java:2507) 
    at weblogic.servlet.internal.ServletRequestImpl$SessionHelper.syncSession(ServletRequestImpl.java:2482) 
    at weblogic.servlet.internal.ServletResponseImpl$1.run(ServletResponseImpl.java:1308) 
    at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321) 
    at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121) 
    at weblogic.servlet.internal.ServletResponseImpl.send(ServletResponseImpl.java:1302) 
    at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1368) 
    at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209) 
    at weblogic.work.ExecuteThread.run(ExecuteThread.java:181) 
>

Oracle表中定义：

CREATE TABLE "FRONTSESSIONS"."WL_SERVLET_SESSIONS" 
    (
    "WL_ID"   VARCHAR2(100 BYTE) NOT NULL ENABLE, 
    "WL_CONTEXT_PATH" VARCHAR2(100 BYTE) NOT NULL ENABLE, 
    "WL_IS_NEW"  CHAR(1 BYTE), 
    "WL_CREATE_TIME" NUMBER(20,0), 
    "WL_IS_VALID"  CHAR(1 BYTE), 
    "WL_SESSION_VALUES" LONG RAW, 
    "WL_ACCESS_TIME"   NUMBER(20,0), 
    "WL_MAX_INACTIVE_INTERVAL" NUMBER(*,0), 
    PRIMARY KEY ("WL_ID", "WL_CONTEXT_PATH") USING INDEX PCTFREE 10 INITRANS 2 MAXTRANS 255 COMPUTE STATISTICS STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) TABLESPACE "FRONTSESSIONS" ENABLE 
) 
    PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 NOCOMPRESS LOGGING STORAGE 
    (
    INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT 
) 
    TABLESPACE "FRONTSESSIONS" ;

谢谢！

来源

2011-04-20 neko

你可以发布实际的Oracle错误消息和表定义吗？ – JoseK 2011-05-04 10:36:36

粘贴WebLogic日志和表定义。 – neko 2011-05-09 10:23:21

我得到完全相同的例外，有人可以帮忙吗？ – ipolevoy 2011-06-06 16:07:49

这些事实是那些是2个独立的服务器（没有WebLogic意义上的集群）并不会停止WebLogic为会话生成相同的ID。如果这些服务器位于集群中，那么WebLogic会将节点标识添加为会话标识的一部分。但是，因为服务器不在集群中，当然有可能在某些时候生成相同的会话ID。

避免该异常的唯一方法是将两台服务器配置为使用不同的表或数据库进行会话存储。

来源

2011-10-27 21:54:03

WebLogic 9.2负载平衡问题

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