We have a situation where JBoss is stored under a read-only disk except for
jboss-3.2.3/server/default/. That directory is symbolically linked to a default/
directory on a read-write disk. This read-write disk has a failover setup.
We experienced a situation where the read-write disk space for
jboss-3.2.3/server/default/ failed over to a redundant disk space. It took around 2
minutes for the failover to complete.
When the failover was completed, the following two exceptions were seen in the
server.log over and over again:
2004-05-19 22:15:36,018 ERROR [org.jboss.mq.il.uil2.SocketManager] Failed to handle:
org.jboss.mq.il.uil2.msgs.AddMsg17556937[msgType: m_addMessage, msgID: 116257, error:
null]
java.io.IOException: Client is not connected
at
org.jboss.mq.il.uil2.SocketManager.internalSendMessage(SocketManager.java:225)
at org.jboss.mq.il.uil2.SocketManager.sendReply(SocketManager.java:208)
at
org.jboss.mq.il.uil2.ServerSocketManagerHandler.handleMsg(ServerSocketManagerHandler.java:87)
at
org.jboss.mq.il.uil2.SocketManager$ReadTask.handleMsg(SocketManager.java:355)
at org.jboss.mq.il.uil2.msgs.BaseMsg.run(BaseMsg.java:377)
at
EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run(PooledExecutor.java:732)
at java.lang.Thread.run(Thread.java:536)
2004-05-19 22:15:37,020 WARN [org.jboss.mq.il.uil2.SocketManager] Failed to send
error reply
java.io.IOException: Client is not connected
at
org.jboss.mq.il.uil2.SocketManager.internalSendMessage(SocketManager.java:225)
at org.jboss.mq.il.uil2.SocketManager.access$800(SocketManager.java:33)
at
org.jboss.mq.il.uil2.SocketManager$ReadTask.handleMsg(SocketManager.java:363)
at org.jboss.mq.il.uil2.msgs.BaseMsg.run(BaseMsg.java:377)
at
EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run(PooledExecutor.java:732)
at java.lang.Thread.run(Thread.java:536)
We suspect that JBoss cannot recover from the disk failover. Once the access to the
entire default/ directory was lost, the entire JBoss process seems to have become
unstable.
Can someone confirm whether our analysis is correct?
Do you have any recommendations for JBoss recovery in case of disk failover?
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