Re: flood of "outstanding proposal" messages

Thu, 07 Jul 2011 14:41:08 -0700 

Thanks very much, good to know.

On 07/07/2011 02:34 PM, Patrick Hunt wrote:

When you are stressing the system outstanding proposals can backup,
the entirety of which will be logged at TRACE level each time an ack
is processed. Alone this should not cause any problems other than the
large logs you highlighted in your original post.

Patrick

On Thu, Jul 7, 2011 at 2:22 PM, Jeremy Stribling<[email protected]>  wrote:

Yes, thanks, we definitely will.  During this test we were trying to track
down some other problem we were having, which is why the debugging level is
turned up.  Are you saying that whatever underlying issue caused these
hundreds of megabytes of messages would only happen in TRACE mode?

On 07/07/2011 02:12 PM, Patrick Hunt wrote:

Hi Jeremy, you're running with TRACE logging turned on which can be
very verbose, I'd suggest you run with INFO level in normal
circumstances.

Patrick

On Thu, Jul 7, 2011 at 10:40 AM, Jeremy Stribling<[email protected]>
  wrote:


Has anyone ever seen Zookeeper explode with a flood of "outstanding
proposal" messages?  I'm running 3.3.3* with three nodes (under fairly
stressful client load), and all of the sudden one of the nodes' logs
starts
filling up with these messages:

2011-07-06 18:37:51,161 628684 [ProcessThread:-1] TRACE
org.apache.zookeeper.server.PrepRequestProcessor  -
:Psessionid:0x5d310234eaf10002 type:delete cxid:0x4e15574f
zxid:0xfffffffffffffffe txntype:unknown

reqpath:/zkrsm/cpt-0000000000000009-000000000000afc8/0000000000000009_record0000003293
2011-07-06 18:37:51,162 628685 [ProcessThread:-1] DEBUG
org.apache.zookeeper.server.quorum.CommitProcessor  - Processing
request::
sessionid:0x5d310234eaf10002 type:delete cxid:0x4e15574f zxid:0x40000121c
txntype:2 reqpath:n/a
2011-07-06 18:37:51,162 628685 [SyncThread:177] TRACE
org.apache.zookeeper.server.quorum.Leader  - Ack zxid: 0x4000011fb
2011-07-06 18:37:51,162 628685 [SyncThread:177] TRACE
org.apache.zookeeper.server.quorum.Leader  - outstanding proposal:
0x400001204
2011-07-06 18:37:51,162 628685 [SyncThread:177] TRACE
org.apache.zookeeper.server.quorum.Leader  - outstanding proposal:
0x40000120d
2011-07-06 18:37:51,162 628685 [SyncThread:177] TRACE
org.apache.zookeeper.server.quorum.Leader  - outstanding proposal:
0x400001207
2011-07-06 18:37:51,162 628685 [SyncThread:177] TRACE
org.apache.zookeeper.server.quorum.Leader  - outstanding proposal:
0x400001215
2011-07-06 18:37:51,162 628685 [SyncThread:177] TRACE
org.apache.zookeeper.server.quorum.Leader  - outstanding proposal:
0x4000011fe
2011-07-06 18:37:51,162 628685 [SyncThread:177] TRACE
org.apache.zookeeper.server.quorum.Leader  - outstanding proposal:
0x400001208
2011-07-06 18:37:51,162 628685 [SyncThread:177] TRACE
org.apache.zookeeper.server.quorum.Leader  - outstanding proposal:
0x400001214
2011-07-06 18:37:51,162 628685 [SyncThread:177] TRACE
org.apache.zookeeper.server.quorum.Leader  - outstanding proposal:
0x400001219
2011-07-06 18:37:51,162 628685 [SyncThread:177] TRACE
org.apache.zookeeper.server.quorum.Leader  - outstanding proposal:
0x400001206
2011-07-06 18:37:51,162 628685 [SyncThread:177] TRACE
org.apache.zookeeper.server.quorum.Leader  - outstanding proposal:
0x400001201
2011-07-06 18:37:51,162 628685 [SyncThread:177] TRACE
org.apache.zookeeper.server.quorum.Leader  - outstanding proposal:
0x400001213
2011-07-06 18:37:51,162 628685 [SyncThread:177] TRACE
org.apache.zookeeper.server.quorum.Leader  - outstanding proposal:
0x4000011ff
2011-07-06 18:37:51,162 628685 [SyncThread:177] TRACE
org.apache.zookeeper.server.quorum.Leader  - outstanding proposal:
0x40000121a
2011-07-06 18:37:51,162 628685 [SyncThread:177] TRACE
org.apache.zookeeper.server.quorum.Leader  - outstanding proposal:
0x400001200
2011-07-06 18:37:51,162 628685 [SyncThread:177] TRACE
org.apache.zookeeper.server.quorum.Leader  - outstanding proposal:
0x40000121b
2011-07-06 18:37:51,162 628685 [SyncThread:177] TRACE
org.apache.zookeeper.server.quorum.Leader  - outstanding proposal:
0x400001209
2011-07-06 18:37:51,162 628685 [SyncThread:177] TRACE
org.apache.zookeeper.server.quorum.Leader  - outstanding proposal:
0x400001212
2011-07-06 18:37:51,162 628685 [SyncThread:177] TRACE
org.apache.zookeeper.server.quorum.Leader  - outstanding proposal:
0x4000011fc
2011-07-06 18:37:51,162 628685 [SyncThread:177] TRACE
org.apache.zookeeper.server.quorum.Leader  - outstanding proposal:
0x400001211
2011-07-06 18:37:51,162 628685 [SyncThread:177] TRACE
org.apache.zookeeper.server.quorum.Leader  - outstanding proposal:
0x400001203
2011-07-06 18:37:51,162 628685 [SyncThread:177] TRACE
org.apache.zookeeper.server.quorum.Leader  - outstanding proposal:
0x40000120a
2011-07-06 18:37:51,162 628685 [SyncThread:177] TRACE
org.apache.zookeeper.server.quorum.Leader  - outstanding proposal:
0x4000011fd
2011-07-06 18:37:51,162 628685 [SyncThread:177] TRACE
org.apache.zookeeper.server.quorum.Leader  - outstanding proposal:
0x400001210
2011-07-06 18:37:51,162 628685 [SyncThread:177] TRACE
org.apache.zookeeper.server.quorum.Leader  - outstanding proposal:
0x400001218
2011-07-06 18:37:51,162 628685 [SyncThread:177] TRACE
org.apache.zookeeper.server.quorum.Leader  - outstanding proposal:
0x400001202
2011-07-06 18:37:51,162 628685 [SyncThread:177] TRACE
org.apache.zookeeper.server.quorum.Leader  - outstanding proposal:
0x40000120b
2011-07-06 18:37:51,162 628685 [SyncThread:177] TRACE
org.apache.zookeeper.server.quorum.Leader  - outstanding proposal:
0x400001216
2011-07-06 18:37:51,162 628685 [SyncThread:177] TRACE
org.apache.zookeeper.server.quorum.Leader  - outstanding proposal:
0x40000120f
2011-07-06 18:37:51,162 628685 [SyncThread:177] TRACE
org.apache.zookeeper.server.quorum.Leader  - outstanding proposal:
0x400001217
2011-07-06 18:37:51,162 628685 [SyncThread:177] TRACE
org.apache.zookeeper.server.quorum.Leader  - outstanding proposal:
0x40000120c

It goes on like that for hundreds of megabytes over a few minutes, until
we
killed the test.  As far as I can tell, there were no node churn events
that
sparked this.

I can provide the full set of logs and/or file a JIRA, but I thought I'd
do
a quick check first to see if this sparked anyone's memory.

Thanks,

Jeremy

* I have applied a few patches on top of 3.3.3, namely a homegrown,
temporary patch for ZOOKEEPER-1046 and one for ZOOKEEPER-1060.

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