Hi Nitay, This is not an error but should be a warning. I have opened up a jira for it.
http://issues.apache.org/jira/browse/ZOOKEEPER-428 The message just says that a client is connecting to a server that is behind that a server is was connected to earlier. The log should be warn and not error and should be fixed in the next release. mahadev On 6/2/09 2:12 PM, "Nitay" <nit...@gmail.com> wrote: > Hey guys, > > We are getting a lot of messages like this in HBase: > > [junit] 2009-06-02 11:57:23,658 ERROR [NIOServerCxn.Factory:21810] > server.NIOServerCnxn(514): Client has seen zxid 0xe our last zxid is 0xd > > For more context, the block it usually appears in is: > > [junit] 2009-06-02 13:27:54,083 INFO [main-SendThread] > zookeeper.ClientCnxn$SendThread(737): Priming connection to > java.nio.channels.SocketChannel[connected local=/0:0:0:0:0:0:0:1%0:56511 > remote=localhost/0:0:0:0:0:0:0:1:21810] > [junit] 2009-06-02 13:27:54,084 INFO [main-SendThread] > zookeeper.ClientCnxn$SendThread(889): Server connection successful > [junit] 2009-06-02 13:27:54,093 INFO [NIOServerCxn.Factory:21810] > server.NIOServerCnxn(532): Connected to /0:0:0:0:0:0:0:1%0:56511 lastZxid 16 > [junit] 2009-06-02 13:27:54,094 ERROR [NIOServerCxn.Factory:21810] > server.NIOServerCnxn(543): Client has seen zxid 0x10 our last zxid is 0x4 > [junit] 2009-06-02 13:27:54,094 WARN [NIOServerCxn.Factory:21810] > server.NIOServerCnxn(444): Exception causing close of session 0x0 due to > java.io.IOException: Client has seen zxid 0x10 our last zxid is 0x4 > [junit] 2009-06-02 13:27:54,094 DEBUG [NIOServerCxn.Facto777ry:21810] > server.NIOServerCnxn(447): IOException stack trace > [junit] java.io.IOException: Client has seen zxid 0x10 our last zxid is > 0x4 > [junit] at > org.apache.zookeeper.server.NIOServerCnxn.readConnectRequest(NIOServerCnxn.jav > a:544) > [junit] at > org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:331) > [junit] at > org.apache.zookeeper.server.NIOServerCnxn$Factory.run(NIOServerCnxn.java:176) > [junit] 2009-06-02 13:27:54,094 INFO [NIOServerCxn.Factory:21810] > server.NIOServerCnxn(777): closing session:0x0 NIOServerCnxn: > java.nio.channels.SocketChannel[connected local=/0:0:0:0:0:0:0:1%0:21810 > remote=/0:0:0:0:0:0:0:1%0:56511] > [junit] 2009-06-02 13:27:54,097 WARN [main-SendThread] > zookeeper.ClientCnxn$SendThread(919): Exception closing session > 0x121a2a7c43a0002 to sun.nio.ch.selectionkeyi...@2c662b4e > [junit] java.io.IOException: Read error rc = -1 > java.nio.DirectByteBuffer[pos=0 lim=4 cap=4] > [junit] at > org.apache.zookeeper.ClientCnxn$SendThread.doIO(ClientCnxn.java:653) > [junit] at > org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:897) > [junit] 2009-06-02 13:27:54,097 WARN [main-SendThread] > zookeeper.ClientCnxn$SendThread(953): Ignoring exception during shutdown > input > [junit] java.net.SocketException: Socket is not connected > [junit] at sun.nio.ch.SocketChannelImpl.shutdown(Native Method) > [junit] at > sun.nio.ch.SocketChannelImpl.shutdownInput(SocketChannelImpl.java:640) > [junit] at > sun.nio.ch.SocketAdaptor.shutdownInput(SocketAdaptor.java:360) > [junit] at > org.apache.zookeeper.ClientCnxn$SendThread.cleanup(ClientCnxn.java:951) > [junit] at > org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:922) > > > This happens in a seemingly endless loop. We are not quite sure what it > means. Can someone help shed some light on these messages? > > Thanks, > -n
