Hi, finally i found that people from Security have started a security agent that was killing/screening connection on port 4000, and I didn't know anything, they drive me mad!!!! Stefano. Da: "Stefano Suzzi" s.su...@protesa.it A: "Tomcat Users List" users@tomcat.apache.org Cc: Data: Tue, 26 Oct 2010 17:06:07 +0200 Oggetto: Re: Tomcat cluster error (null pointer except) on NioReceiver.java:266
> In the post before I sed why accept() returns null, so i was> investigating > in tomcat and jdk_1.6 source code, > and I found that the method accept in > ServerSocketChannel.java can> return null in case of non-blocking socket e no > connection available.> Should this be tested? > and why ask for session > replication when the connection is not> established?> plus, from the logs it > looks like that later is not retry again to> re-establish the connection.> > > Anyway, it seems that in my production environment the request does not> stay > pending enough to be accepted, > any suggestion about what I can check?> > > Thanks.> Stefano.> > > Source:> > http://www.javakey.net/source/jdk/1.6/java/nio/channels/ServerSocketChannel.java.html> > > I add the comment found in the api doc:> Returns:> > The socket > channel for the new connection, or null if this> channel is in > non-blocking mode and no connection is available> to be accepted> > > http://download.oracle.com/javase/6/docs/api/java/nio/channels/ServerSocketChannel.html#accept%28%29> > > > NioReceiver.java snippet:> --------------------------------------> 257 > // get an iterator over the set of selected keys > 258 Iterator it = > selector.selectedKeys().iterator(); > 259 // look at each key in the selected > set > 260 while (it.hasNext()) { > 261 SelectionKey key = (SelectionKey) > it.next(); > 262 // Is a new connection coming in? > 263 if > (key.isAcceptable()) { > 264 ServerSocketChannel server = > (ServerSocketChannel)> key.channel(); > 265 SocketChannel channel = > server.accept(); > 266 > channel.socket().setReceiveBufferSize(getRxBufSize()); > > > catalina.out > pieces:> > INFO: Starting Servlet Engine: Apache Tomcat/6.0.26> 20-oct-2010 > 11:49:23 org.apache.catalina.ha.tcp.SimpleTcpCluster start> INFO: Cluster is > about to start> 20-oct-2010 11:49:23 > org.apache.catalina.tribes.transport.ReceiverBase> bind> INFO: Receiver > Server Socket bound to:/10.75.64.205:4000> 20-oct-2010 11:49:23> > org.apache.catalina.tribes.membership.McastServiceImpl setupSocket> INFO: > Setting cluster mcast soTimeout to 500> 20-oct-2010 11:49:23> > org.apache.catalina.tribes.membership.McastServiceImpl waitForMembers> INFO: > Sleeping for 1000 milliseconds to establish cluster membership,> start > level:4> 20-oct-2010 11:49:24 org.apache.catalina.ha.tcp.SimpleTcpCluster> > memberAdded> INFO: Replication member> > added:org.apache.catalina.tribes.membership.MemberImpl[tcp://{10, 75,> 64, > 206}:4000,{10, 75, 64, 206},4000, alive=32137,id={-61 -37 107 -64> -44 -77 71 > 29 -102 -121 -88 16 -50 -54 43 97 }, payload={}, command={},> domain={}, ]> > 20-oct-2010 11:49:24 org.apache.catalina.ha.tcp.SimpleTcpCluster> > memberAdded> INFO: Replication member> > added:org.apache.catalina.tribes.membership.MemberImpl[tcp://{10, 75,> 64, > 207}:4000,{10, 75, 64, 207},4000, alive=72301,id={-49 -8 114 -44 118> 127 77 > 29 -78 104 101 -87 -73 62 -111 100 }, payload={}, command={},> domain={}, ]> > 20-oct-2010 11:49:24> org.apache.catalina.tribes.membership.McastServiceImpl > waitForMembers> INFO: Done sleeping, membership established, start level:4> > 20-oct-2010 11:49:24> org.apache.catalina.tribes.membership.McastServiceImpl > waitForMembers> INFO: Sleeping for 1000 milliseconds to establish cluster > membership,> start level:8> 20-oct-2010 11:49:24> > org.apache.catalina.tribes.transport.nio.NioReceiver listen> GRAVE: Unable to > process request in NioReceiver> java.lang.NullPointerException> at> > org.apache.catalina.tribes.transport.nio.NioReceiver.listen(NioReceiver.java:266)> > at> > org.apache.catalina.tribes.transport.nio.NioReceiver.run(NioReceiver.java:353)> > at java.lang.Thread.run(Thread.java:619)> ........................> > ..........................> 20-oct-2010 11:49:26 > org.apache.catalina.ha.session.DeltaManager> getAllClusterSessions> > ADVERTENCIA: Gestor [localhost#/yadas], requiriendo estado de sesión> desde > org.apache.catalina.tribes.membership.MemberImpl[tcp://{10, 75,> 64, > 207}:4000,{10, 75, 64, 207},4000, alive=74309,id={-49 -8 114 -44 118> 127 77 > 29 -78 104 101 -87 -73 62 -111 100 }, payload={}, command={},> domain={}, ]. > Esta operación se agotará si no se recibe estado de sesión> dentro de 60 > segundos.> 20-oct-2010 11:49:26> > org.apache.catalina.tribes.group.interceptors.ThroughputInterceptor> report> > INFO: ThroughputInterceptor Report[> Tx Msg:1 messages> > Sent:0,00 MB (total)> Sent:0,00 MB (application)> Time:0,01 seconds> > Tx Speed:0,06 MB/sec (total)> TxSpeed:0,06 MB/sec (application)> > Error Msg:0> Rx Msg:0 messages> Rx Speed:0,00 MB/sec (since 1st msg)> > Received:0,00 MB]> > 20-oct-2010 11:50:26 > org.apache.catalina.ha.session.DeltaManager> waitForSendAllSessions> GRAVE: > Gestor [localhost#/yadas]: No se ha recibido estado de sesión a> las 20/10/10 > 11:49, agotando tiempo tras 60.096 ms.> > > > > Il giorno lun, 25/10/2010 > alle 17.21 +0200, Stefano Suzzi ha scritto:> > > Hi, thanks for reply,> > I > was watching too the NioReceiver.java source code, and I was wondering> > why > server.accept() does not throw an exception instead null, mha!.> > > > The > java version in production is 1.6.0_20 vendor Sun 64bit.> > while in my devel > environment is 1.6.0_11 vendor Sun 32bit.> > > > In catalina.out there is a > line about the APR library that shows the> > "java library path" that could > be usefull :> > java.library.path: > /usr/java/jdk1.6.0_20/jre/lib/amd64/server:/usr/java/jdk1.6.0_20/jre/lib/amd64:/usr/java/jdk1.6.0_20/jre/../lib/amd64:/opt/CA/SharedComponents/lib:/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib> > > > > Any Suggestion?> > Stefano.> > > > > > > > Il giorno sab, 23/10/2010 > alle 00.21 +0400, Konstantin Kolinko ha> > scritto:> > > > > 2010/10/22 > Stefano Suzzi :> > > >> > > > Hi, i've 3 tomcat 6.0.26 on 3 different IBM > machines linux RedHat el> > > > 5, kernel.osrelease = 2.6.18-194.el5 .> > > > >> > > > The 3 tomcat are giving an error that cannot replicate the session,> > > > > of course I cannot replicate the error in my devel systems that work> > > > > perfectly with the same configuration.> > > > In anycase I can access my > web application but it works only locally.> > > >> > > > Here is the > catalina.out with the error in red and the configuration> > > > file > server.xml> > > >> > > > any help is really appreciated.> > > >> > > > > > > Looking at the sources for NioReceiver.java:266 of TC 6.0.26 [1],> > > > > > > ServerSocketChannel server => > > > (ServerSocketChannel) key.channel();> > > > SocketChannel channel = server.accept();> > > 266 -> > channel.socket().setReceiveBufferSize(getRxBufSize());> > > > > > so it is > likely that ServerSocketChannel.accept() call on line 265> > > returned > null.> > > > > > What is your Java vendor and version?> > > > > > [1] > http://svn.apache.org/viewvc/tomcat/tc6.0.x/tags/TOMCAT_6_0_26/java/org/apache/catalina/tribes/transport/nio/NioReceiver.java?revision=920929&view=markup#l266> > > > > > > > > > > > > By the way, when you will post your server.xml next > time, please> > > remove all the comments.> > > > > > > > > Best regards,> > > > Konstantin Kolinko> > > > > > > ---------------------------------------------------------------------> > > To > unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org> > > For additional > commands, e-mail: users-h...@tomcat.apache.org> > > > > >
