The first error
>java.util.ConcurrentModificationException
happens cause the membership changed in between. The error logs, but the
system is not interrupted.
The second error
>java.net.SocketTimeoutException: Read timed out
This means the node failed to respond. This means you got a problem. You
should post
- your exact tomcat version
- your configuration
- your jvm version
best
Filip
On 04/14/2010 05:01 AM, Pardeep Ruhil wrote:
Hi,
We are running our application in load balanced mode in Tomcat 6.0 with
session replication.
When we are starting the servers in load balanced mode, then in the console we
are getting the following error :
2010-04-14 11:47:51,078 (main) [ VfsLog.java:122:INFO ] Using
"C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\vfs_cache" as temporary files store.
2010-04-14 11:48:05,140 (GroupChannel-Heartbeat-1) [
GroupChannel.java:665:ERROR] Unable to send heartbeat through Tribes
interceptor stack. Will try to sleep again.
java.util.ConcurrentModificationException
at
java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
at java.util.AbstractList$Itr.next(AbstractList.java:343)
at
org.apache.catalina.tribes.group.GroupChannel.heartbeat(GroupChannel.java:152)
at
org.apache.catalina.tribes.group.GroupChannel$HeartbeatThread.run(GroupChannel.java:661)
class org.webslinger.commons.vfs.flat.FlatFileProvider
2010-04-14 11:48:09,937 (main) [ ChannelSocket.java:387:INFO ] JK: ajp13
listening on /0.0.0.0:8009
2010-04-14 11:48:09,984 (main) [ JkMain.java:344:INFO ] Jk running
ID=0 time=16/78 config=null
2010-04-14 11:48:10,125 (main) [ Http11Protocol.java:209:INFO ] Starting
Coyote HTTP/1.1 on http-0.0.0.0-8080
When we are testing 100 concurrent users using JMeter, it is giving following
error after 5-10 mins.
0-04-14 09:46:10,703 (GroupChannel-Heartbeat-1) [
BioSender.java:287:WARN ] Unable to read acknowledgement from [/192.168.1.3:1,93
a.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.tribes.transport.bio.BioSender.waitForAck(BioSender.java:263)
at
org.apache.catalina.tribes.transport.bio.BioSender.pushMessage(BioSender.java:245)
at
org.apache.catalina.tribes.transport.bio.BioSender.sendMessage(BioSender.java:125)
at
org.apache.catalina.tribes.transport.bio.MultipointBioSender.sendMessage(MultipointBioSender.java:52)
at
org.apache.catalina.tribes.transport.bio.PooledMultiSender.sendMessage(PooledMultiSender.java:51)
at
org.apache.catalina.tribes.transport.ReplicationTransmitter.sendMessage(ReplicationTransmitter.java:80)
at
org.apache.catalina.tribes.group.ChannelCoordinator.sendMessage(ChannelCoordinator.java:78)
at
org.apache.catalina.tribes.group.ChannelInterceptorBase.sendMessage(ChannelInterceptorBase.java:75)
at
org.apache.catalina.tribes.group.interceptors.TcpFailureDetector.sendMessage(TcpFailureDetector.java:87)
at
org.apache.catalina.tribes.group.ChannelInterceptorBase.sendMessage(ChannelInterceptorBase.java:75)
at
org.apache.catalina.tribes.group.interceptors.MessageDispatchInterceptor.sendMessage(MessageDispatchInterceptor.java:73)
at
org.apache.catalina.tribes.group.ChannelInterceptorBase.sendMessage(ChannelInterceptorBase.java:75)
at
org.apache.catalina.tribes.group.GroupChannel.send(GroupChannel.java:216)
at
org.apache.catalina.tribes.group.GroupChannel.send(GroupChannel.java:175)
at org.apache.catalina.tribes.group.RpcChannel.send(RpcChannel.java:89)
at
org.apache.catalina.tribes.tipis.AbstractReplicatedMap.ping(AbstractReplicatedMap.java:253)
at
org.apache.catalina.tribes.tipis.AbstractReplicatedMap.heartbeat(AbstractReplicatedMap.java:793)
at
org.apache.catalina.tribes.group.GroupChannel.heartbeat(GroupChannel.java:153)
at
org.apache.catalina.tribes.group.GroupChannel$HeartbeatThread.run(GroupChannel.java:661)
0-04-14 09:46:13,718 (GroupChannel-Heartbeat-1)
[AbstractReplicatedMap.java:795:ERROR] Unable to send
AbstractReplicatedMap.ping message
.apache.catalina.tribes.ChannelException: java.net.SocketTimeoutException: Read
timed out; Faulty members:tcp://{-64, -88, 1, 3}:4001;
at
org.apache.catalina.tribes.transport.bio.MultipointBioSender.sendMessage(MultipointBioSender.java:54)
at
org.apache.catalina.tribes.transport.bio.PooledMultiSender.sendMessage(PooledMultiSender.java:51)
at
org.apache.catalina.tribes.transport.ReplicationTransmitter.sendMessage(ReplicationTransmitter.java:80)
at
org.apache.catalina.tribes.group.ChannelCoordinator.sendMessage(ChannelCoordinator.java:78)
at
org.apache.catalina.tribes.group.ChannelInterceptorBase.sendMessage(ChannelInterceptorBase.java:75)
at
org.apache.catalina.tribes.group.interceptors.TcpFailureDetector.sendMessage(TcpFailureDetector.java:87)
at
org.apache.catalina.tribes.group.ChannelInterceptorBase.sendMessage(ChannelInterceptorBase.java:75)
at
org.apache.catalina.tribes.group.interceptors.MessageDispatchInterceptor.sendMessage(MessageDispatchInterceptor.java:73)
at
org.apache.catalina.tribes.group.ChannelInterceptorBase.sendMessage(ChannelInterceptorBase.java:75)
at
org.apache.catalina.tribes.group.GroupChannel.send(GroupChannel.java:216)
at
org.apache.catalina.tribes.group.GroupChannel.send(GroupChannel.java:175)
at org.apache.catalina.tribes.group.RpcChannel.send(RpcChannel.java:89)
at
org.apache.catalina.tribes.tipis.AbstractReplicatedMap.ping(AbstractReplicatedMap.java:253)
at
org.apache.catalina.tribes.tipis.AbstractReplicatedMap.heartbeat(AbstractReplicatedMap.java:793)
at
org.apache.catalina.tribes.group.GroupChannel.heartbeat(GroupChannel.java:153)
at
org.apache.catalina.tribes.group.GroupChannel$HeartbeatThread.run(GroupChannel.java:661)
sed by: 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.tribes.transport.bio.BioSender.waitForAck(BioSender.java:263)
at
org.apache.catalina.tribes.transport.bio.BioSender.pushMessage(BioSender.java:245)
at
org.apache.catalina.tribes.transport.bio.BioSender.sendMessage(BioSender.java:134)
at
org.apache.catalina.tribes.transport.bio.MultipointBioSender.sendMessage(MultipointBioSender.java:52)
... 15 more
Please give suggestion /solution of this load balance problem.
Thanks& Regards
Pradeep Ruhil
L& T Infotech
Mahape, Vashi
Mumbai
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