jboss-remoting-issues December 2010

jboss-remoting-issues@lists.jboss.org

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[JBoss JIRA] Created: (JBREM-1242) Fix deadlock between Client and MicroRemoteClientInvoker

by Ron Sigal (JIRA)

Fix deadlock between Client and MicroRemoteClientInvoker -------------------------------------------------------- Key: JBREM-1242 URL: https://jira.jboss.org/browse/JBREM-1242 Project: JBoss Remoting Issue Type: Bug Security Level: Public (Everyone can see) Affects Versions: 2.5.3.SP1, 2.2.3.SP3 Reporter: Ron Sigal Assignee: Ron Sigal Fix For: 2.5.3.SP2, 2.2.3.SP4 1. a. org.jboss.remoting.Client.setupClientLease() calls MicroRemoteClientInvoker.establishLease() b. org.jboss.remoting.MicroRemoteClientInvoker.establishLease() synchronizes on MicroRemoteClientInvoker.clientLeaseLock and calls Client.addConnectionListener() c. Client.addConnectionListener() synchronizes on Client.connectionValidatorLock 2. a. Client.addConnectionListener() synchronizes on Client.connectionValidatorLock and calls new ConnectionValidator() b. new ConnectionValidator() calls MicroRemoteClientInvoker.getLeasePinger(), which synchronizes on MicroRemoteClientInvoker.clientLeaseLock -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: https://jira.jboss.org/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira

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[JBoss JIRA] Created: (JBREM-1226) Sockets created by bisocket secondary ServerSocket should be configured properly

by Ron Sigal (JIRA)

Sockets created by bisocket secondary ServerSocket should be configured properly -------------------------------------------------------------------------------- Key: JBREM-1226 URL: https://jira.jboss.org/browse/JBREM-1226 Project: JBoss Remoting Issue Type: Bug Security Level: Public (Everyone can see) Affects Versions: 2.2.3.SP2, 2.5.2.SP3 (Flounder) Reporter: Ron Sigal Assignee: Ron Sigal Fix For: 2.2.3.SP3, 2.5.2.SP4 (Flounder) Sockets created by org.jboss.remoting.transport.socket.SocketServerInvoker are configured by protected void configureSocket(Socket s) throws SocketException { s.setReuseAddress(getReuseAddress()); if (keepAliveSet) s.setKeepAlive(keepAlive); if (oOBInlineSet) s.setOOBInline(oOBInline); if (receiveBufferSize > -1) s.setReceiveBufferSize(receiveBufferSize); if (sendBufferSize > -1) s.setSendBufferSize(sendBufferSize); if (soLingerSet && soLingerDuration > 0) s.setSoLinger(soLinger, soLingerDuration); if (trafficClass > -1) s.setTrafficClass(trafficClass); } but configureSocket() is not called for sockets created by org.jboss.remoting.transport.bisocket.BisocketServerInvoker. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: https://jira.jboss.org/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira

13 years, 11 months

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[JBoss JIRA] Created: (JBREM-1247) BisocketClientInvoker$PingTimerTask NPE

by Ron Sigal (JIRA)

BisocketClientInvoker$PingTimerTask NPE --------------------------------------- Key: JBREM-1247 URL: https://jira.jboss.org/browse/JBREM-1247 Project: JBoss Remoting Issue Type: Bug Security Level: Public (Everyone can see) Affects Versions: 2.5.3.SP1 Reporter: Ron Sigal Assignee: Ron Sigal Priority: Minor Fix For: 2.5.3.SP2 org.jboss.remoting.transport.bisocket.BisocketClientInvoker$PingTimerTask.run() checks the variable running before accessing the controlOutputStream variable, which is set to null by PingTimerTask.shutdown(). However, PingTimerTask.shutdown() doesn't set running to false. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: https://jira.jboss.org/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira

13 years, 11 months

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[JBoss JIRA] Created: (JBREM-1227) Fix deadlock between MicroRemoteClientInvoker and RemotingClassLoader

by Ron Sigal (JIRA)

Fix deadlock between MicroRemoteClientInvoker and RemotingClassLoader --------------------------------------------------------------------- Key: JBREM-1227 URL: https://jira.jboss.org/browse/JBREM-1227 Project: JBoss Remoting Issue Type: Bug Security Level: Public (Everyone can see) Affects Versions: 2.5.2.SP3 (Flounder) Reporter: Ron Sigal Assignee: Ron Sigal Fix For: 2.5.2.SP4 (Flounder) The following deadlock can occur: 1. Thread T1 reads a response with an object whose class is not available locally, so it uses its org.jboss.remoting.loading.RemotingClassLoader to try to download the class a. java.lang.ClassLoader.loadClassInternal() acquires a lock on itself (an instance of RemotingClassLoader) b. RemotingClassLoader uses its copy of an org.jboss.remoting.loading.ClassByteClassLoader to try to download the class c. ClassByteClassLoader calls org.jboss.remoting.MicroRemoteClientInvoker.invoke(), which tries to synchronize on MicroRemoteClientInvoker.class as it sets up an UnMarshaller with a ClassLoader 2. Thread T2 attempts to make an invocation a. MicroRemoteClientInvoker.invoke() acquires a lock on MicroRemoteClientInvoker.class b. MicroRemoteClientInvoker.invoke() calls the synchronized method RemotingClassLoader.setUserClassLoader(), which tries to acquire a lock on the RemotingClassLoader Deadlock. The only two synchronized methods in RemotingClassLoader are setUserClassLoader() and unsetUserClassLoader(), which are both called from MicroRemoteClientInvoker.invoke(). The call to setUserClassLoader() is already done while the MicroRemoteClientInvoker.class lock is held. If the call to unsetUserClassLoader() is made with the same lock, then setUserClassLoader() and unsetClassLoader() don't have to be synchronized. That will eliminate the deadlock because step 2b is removed. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: https://jira.jboss.org/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira

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jboss-remoting-issues December 2010