Hello everybody,
we are running a couple of clustered Tomcat 5.5.9 instances and keep
experiencing problems in our productive environment. This is
the configuration:
<Cluster className="org.apache.catalina.cluster.tcp.SimpleTcpCluster"
managerClassName="org.apache.catalina.cluster.session.DeltaManager"
expireSessionsOnShutdown="false"
useDirtyFlag="true"
notifyListenersOnReplication="true">
<Membership
className="org.apache.catalina.cluster.mcast.McastService"
mcastAddr="239.255.0.1"
mcastPort="45789"
mcastFrequency="500"
mcastDropTime="3000"/>
<Receiver
className="org.apache.catalina.cluster.tcp.ReplicationListener"
tcpListenAddress="10.0.0.30"
tcpListenPort="4439"
tcpSelectorTimeout="100"
tcpThreadCount="2"/>
<Sender
className="org.apache.catalina.cluster.tcp.ReplicationTransmitter"
replicationMode="pooled"
ackTimeout="15000"/>
<Valve className="org.apache.catalina.cluster.tcp.ReplicationValve"
filter=".*\.gif;.*\.js;.*\.jpg;.*\.png;.*\.htm;.*\.html;.*\.css;.*\.txt;"/>
<Deployer
className="org.apache.catalina.cluster.deploy.FarmWarDeployer"
tempDir="/tmp/war-temp38/"
deployDir="/opt/jakarta/dep38/war-deploy/"
watchDir="/opt/jakarta/dep38/war-listen/"
watchEnabled="false"/>
</Cluster>
This is the log of node2:
Jun 22, 2009 10:06:16 AM org.apache.catalina.cluster.tcp.DataSender waitForAck
WARNING: Wasnt able to read acknowledgement from server[{0}:{1,number,integer}]
in {2,number,integer} ms. Disconnecting socket, and
trying again.
Jun 22, 2009 10:06:16 AM org.apache.catalina.cluster.tcp.DataSender waitForAck
WARNING: Wasnt able to read acknowledgement from server[{0}:{1,number,integer}]
in {2,number,integer} ms. Disconnecting socket, and
trying again.
Jun 22, 2009 10:06:31 AM org.apache.catalina.cluster.tcp.DataSender waitForAck
WARNING: Wasnt able to read acknowledgement from server[{0}:{1,number,integer}]
in {2,number,integer} ms. Disconnecting socket, and
trying again.
Jun 22, 2009 10:06:31 AM org.apache.catalina.cluster.tcp.ReplicationTransmitter
sendMessageData
WARNING: Unable to send replicated message, is server down?
java.net.SocketTimeoutException: Read timed out
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(SocketInputStream.java:129)
at java.net.SocketInputStream.read(SocketInputStream.java:182)
at
org.apache.catalina.cluster.tcp.DataSender.waitForAck(DataSender.java:530)
at
org.apache.catalina.cluster.tcp.DataSender.pushMessage(DataSender.java:508)
at
org.apache.catalina.cluster.tcp.DataSender.sendMessage(DataSender.java:378)
at
org.apache.catalina.cluster.tcp.PooledSocketSender.sendMessage(PooledSocketSender.java:118)
at
org.apache.catalina.cluster.tcp.ReplicationTransmitter.sendMessageData(ReplicationTransmitter.java:646)
at
org.apache.catalina.cluster.tcp.ReplicationTransmitter.sendMessage(ReplicationTransmitter.java:348)
at
org.apache.catalina.cluster.tcp.SimpleTcpCluster.send(SimpleTcpCluster.java:466)
at
org.apache.catalina.cluster.tcp.SimpleTcpCluster.send(SimpleTcpCluster.java:495)
at
org.apache.catalina.cluster.session.DeltaManager.sessionExpired(DeltaManager.java:811)
at
org.apache.catalina.cluster.session.DeltaSession.expire(DeltaSession.java:730)
at
org.apache.catalina.cluster.session.DeltaSession.expire(DeltaSession.java:653)
at
org.apache.catalina.cluster.session.DeltaSession.expire(DeltaSession.java:641)
at
org.apache.catalina.cluster.session.DeltaSession.invalidate(DeltaSession.java:1042)
at
org.apache.catalina.cluster.session.DeltaSessionFacade.invalidate(DeltaSessionFacade.java:150)
at webapp.control.FrontServlet.doProcessRequest(Unknown Source)
at webapp.control.FrontServlet.doGet(Unknown Source)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at filters.TimeoutFilter.doFilter(TimeoutFilter.java:53)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at
org.apache.catalina.cluster.tcp.ReplicationValve.invoke(ReplicationValve.java:145)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:307)
at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:385)
at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:748)
at
org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:678)
at org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:871)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:595)
Jun 22, 2009 10:06:31 AM org.apache.catalina.cluster.tcp.DataSender waitForAck
WARNING: Wasnt able to read acknowledgement from server[{0}:{1,number,integer}]
in {2,number,integer} ms. Disconnecting socket, and
trying again.
Jun 22, 2009 10:06:46 AM org.apache.catalina.cluster.tcp.DataSender waitForAck
WARNING: Wasnt able to read acknowledgement from server[{0}:{1,number,integer}]
in {2,number,integer} ms. Disconnecting socket, and
trying again.
Jun 22, 2009 10:06:56 AM org.apache.catalina.cluster.tcp.DataSender <init>
INFO: Create sender [cwww1/10.0.0.30:4,437]
Jun 22, 2009 10:07:01 AM org.apache.catalina.cluster.tcp.DataSender waitForAck
WARNING: Wasnt able to read acknowledgement from server[{0}:{1,number,integer}]
in {2,number,integer} ms. Disconnecting socket, and
trying again.
Jun 22, 2009 10:07:02 AM org.apache.catalina.cluster.tcp.DataSender waitForAck
WARNING: Wasnt able to read acknowledgement from server[{0}:{1,number,integer}]
in {2,number,integer} ms. Disconnecting socket, and
trying again.
The node1 logs do not show anything during that time. I have read that for a
productive environment to increase
mcastFrequency="500", mcastDropTime="3000" and to install the cluster fix. But
my guess is that the problem with receiving the
acknowledgement is more or a session replication problem and not a problem
receiving the tomcat heartbeats.
Thanks for your help
Regards
KE
Geschäftsführung: Dr. Michael Fischer, Reinhard Eisebitt
Amtsgericht Köln HRB 32356
Steuer-Nr.: 217/5717/0536
Ust.Id.-Nr.: DE 204051920
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