A bit more info in the trace file, but no obvious reason why the server
is expiring the session:
2008-05-23 14:25:47,267 - TRACE [main:[EMAIL PROTECTED] - Snapshotting: 0
2008-05-23 14:25:47,287 - TRACE [main:[EMAIL PROTECTED] - Snapshotting
finished: 0
2008-05-23 14:26:08,354 - WARN
[NIOServerCxn.Factory:[EMAIL PROTECTED] - Connected to
/xxx.xxx.xxx.xxx:35713 lastZxid 0
2008-05-23 14:26:08,357 - TRACE [NIOServerCxn.Factory:[EMAIL PROTECTED] -
SessionTrackerImpl --- Adding 11a1707891b0000 6000
2008-05-23 14:26:08,362 - WARN
[NIOServerCxn.Factory:[EMAIL PROTECTED] - Creating new session
11a1707891b0000
2008-05-23 14:26:08,363 - TRACE [ProcessThread:[EMAIL PROTECTED] -
:P11a1707891b0000 0 fffffffffffffffe txn type = unknown createSession n/a
2008-05-23 14:26:08,369 - TRACE [ProcessThread:[EMAIL PROTECTED] -
SessionTrackerImpl --- Existing session 11a1707891b0000 6000
2008-05-23 14:26:08,371 - TRACE [SyncThread:[EMAIL PROTECTED] -
:S11a1707891b0000 0 1 txn type = -10 createSession n/a
2008-05-23 14:26:08,397 - TRACE [SyncThread:[EMAIL PROTECTED] -
:E11a1707891b0000 0 1 txn type = -10 createSession n/a
2008-05-23 14:26:08,400 - TRACE [SyncThread:[EMAIL PROTECTED] -
SessionTrackerImpl --- Existing session 11a1707891b0000 6000
2008-05-23 14:26:08,406 - WARN [SyncThread:[EMAIL PROTECTED] -
Finished init of 11a1707891b0000: true
2008-05-23 14:26:08,412 - TRACE [ProcessThread:[EMAIL PROTECTED] -
:P11a1707891b0000 1 fffffffffffffffe txn type = unknown exists /locks
2008-05-23 14:26:08,413 - TRACE [SyncThread:[EMAIL PROTECTED] -
:S11a1707891b0000 1 fffffffffffffffe txn type = unknown exists /locks
2008-05-23 14:26:08,415 - TRACE [SyncThread:[EMAIL PROTECTED] -
:E11a1707891b0000 1 fffffffffffffffe txn type = unknown exists /locks
2008-05-23 14:26:14,435 - TRACE [NIOServerCxn.Factory:[EMAIL PROTECTED] -
close NIOServerCnxn: java.nio.channels.SocketChannel[connected
local=/xxx.xxx.xxx.xxx:2181 remote=/xxx.xxx.xxx.xxx:35713]
2008-05-23 14:26:15,010 - WARN
[SessionTracker:[EMAIL PROTECTED] - Expiring 11a1707891b0000
2008-05-23 14:26:15,012 - TRACE [SessionTracker:[EMAIL PROTECTED] -
ZooKeeperServer --- Session to expire: 11a1707891b0000
2008-05-23 14:26:15,013 - TRACE [SessionTracker:[EMAIL PROTECTED] -
ZooKeeperServer --- Session to be closed: 11a1707891b0000
2008-05-23 14:26:15,015 - TRACE [ProcessThread:[EMAIL PROTECTED] -
:P11a1707891b0000 0 fffffffffffffffe txn type = unknown closeSession n/a
2008-05-23 14:26:15,017 - WARN
[ProcessThread:[EMAIL PROTECTED] - Processed session
termination request for id: 11a1707891b0000
2008-05-23 14:26:15,019 - TRACE [SyncThread:[EMAIL PROTECTED] -
:S11a1707891b0000 0 2 txn type = -11 closeSession n/a
2008-05-23 14:26:15,023 - TRACE [SyncThread:[EMAIL PROTECTED] -
:E11a1707891b0000 0 2 txn type = -11 closeSession n/a
2008-05-23 14:26:15,025 - TRACE [SyncThread:[EMAIL PROTECTED] -
SessionTrackerImpl --- Removing 11a1707891b0000
2008-05-23 14:26:15,816 - WARN
[NIOServerCxn.Factory:[EMAIL PROTECTED] - Connected to
/xxx.xxx.xxx.xxx:35714 lastZxid -1
2008-05-23 14:26:15,818 - TRACE [NIOServerCxn.Factory:[EMAIL PROTECTED] -
Session 11a1707891b0000 is valid: false
2008-05-23 14:26:15,819 - WARN
[NIOServerCxn.Factory:[EMAIL PROTECTED] - Finished init of
11a1707891b0000: false
2008-05-23 14:26:15,821 - WARN
[NIOServerCxn.Factory:[EMAIL PROTECTED] - Renewing session
11a1707891b0000
2008-05-23 14:26:15,823 - TRACE [NIOServerCxn.Factory:[EMAIL PROTECTED] -
close NIOServerCnxn: java.nio.channels.SocketChannel[connected
local=/xxx.xxx.xxx.xxx:2181 remote=/xxx.xxx.xxx.xxx:35714]
Juan Ramirez wrote:
> Hi, Ben. Thanks for the prompt reply.
>
> Benjamin Reed wrote:
>> Usually, this exception means that the server closed the socket. Are you
>> seeing anything strange in the server log?
>>
>
> It seems like the server is expiring the session; not sure why.
>
> 2008-05-23 14:26:08,354 - WARN [NIOServerCxn.Factory:[EMAIL PROTECTED]
> - Connected to /xxx.xxx.xxx.xxx:35713 lastZxid 0
> 2008-05-23 14:26:08,362 - WARN [NIOServerCxn.Factory:[EMAIL PROTECTED]
> - Creating new session 11a1707891b0000
> 2008-05-23 14:26:08,406 - WARN [SyncThread:[EMAIL PROTECTED] -
> Finished init of 11a1707891b0000: true
> 2008-05-23 14:26:15,010 - WARN [SessionTracker:[EMAIL PROTECTED]
> - Expiring 11a1707891b0000
> 2008-05-23 14:26:15,017 - WARN [ProcessThread:[EMAIL PROTECTED]
> - Processed session termination request for id: 11a1707891b0000
>
> New connection request from client?
>
> 2008-05-23 14:26:15,816 - WARN [NIOServerCxn.Factory:[EMAIL PROTECTED]
> - Connected to /xxx.xxx.xxx.xxx:35714 lastZxid -1
> 2008-05-23 14:26:15,819 - WARN [NIOServerCxn.Factory:[EMAIL PROTECTED]
> - Finished init of 11a1707891b0000: false
> 2008-05-23 14:26:15,821 - WARN [NIOServerCxn.Factory:[EMAIL PROTECTED]
> - Renewing session 11a1707891b0000
>
> But doesn't seem like the client recovers:
>
> com.yahoo.zookeeper.KeeperException: KeeperErrorCode = SessionExpired
> at com.yahoo.zookeeper.ZooKeeper.exists(ZooKeeper.java:357)
> at zookeeperclient.Main$Process.tryCreate(Main.java:143)
> at zookeeperclient.Main$Process.<init>(Main.java:88)
> at zookeeperclient.Main.main(Main.java:43)
> com.yahoo.zookeeper.KeeperException: KeeperErrorCode = SessionExpired
> at com.yahoo.zookeeper.ZooKeeper.exists(ZooKeeper.java:357)
> at zookeeperclient.Main$Process.tryCreate(Main.java:143)
> at zookeeperclient.Main$Process.<init>(Main.java:88)
> at zookeeperclient.Main.main(Main.java:43)
>
>
>
>> The null pointer exception is coming from the code that parses the hostPort
>> list. Since you are running in standalone mode your hostPort should be a
>> string of the form host:port. The relevant code is the following:
>>
>> String hostsList[] = hosts.split(",");
>> for (String host : hostsList) {
>> int port = 2181;
>> String parts[] = host.split(":"); // LINE 218
>>
>> It would seem that host is null, but I'm at a complete loss for how that
>> could
>> be...
>
> Sorry, that was my bad. It seems that once the ZooKeeper instance gets
> into the SessionExpired state, it doesn't recover. Is this expected? I
> had some code creating a new instance as a workaround and had not
> properly persisted the connection string.
>
> Thanks again,
>
> Juan
>
>
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