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From Arindam Barua <aba...@247-inc.com>
Subject RE: Bootstrap stuck: vnode enabled 1.2.12
Date Tue, 25 Feb 2014 01:04:23 GMT

The host would not join the ring after more clean bootstrap attempts.

Noticed nodetool netstats, even though doesn't repair any streaming, does constantly report
"Nothing streaming from" 3 specific hosts in the ring.

$ nodetool netstats
xss =  -ea -d64 -javaagent:/usr/local/cassandra/bin/../lib/jamm-0.2.5.jar -XX:+UseThreadPriorities
-XX:ThreadPriorityPolicy=42 -Xms8043M -Xmx8043M -Xmn800M -XX:+HeapDumpOnOutOfMemoryError -Xss256k
Mode: JOINING
Not sending any streams.
Nothing streaming from /10.67.XXX.XXX
Nothing streaming from /10.67.XXX.XXX
Nothing streaming from /10.67.XXX.XXX

Today when I had to do some unrelated maintenance and attempted to drain the hosts mentioned
above before restarting cassandra, the drain would just hang. Other hosts in the ring did
not have any issue.
Also the original host that is stuck in the joining state, logged the following:

[24/02/2014:15:49:42 PST] GossipTasks:1: ERROR AbstractStreamSession.java (line 110) Stream
failed because /10.67.XXX.XXX died or was restarted/removed (streams may still be active in
background, but further streams won't be started)
[24/02/2014:15:49:42 PST] GossipTasks:1:  WARN RangeStreamer.java (line 246) Streaming from
/10.67.XXX.XXX failed


From: Arindam Barua [mailto:abarua@247-inc.com]
Sent: Tuesday, February 18, 2014 5:16 PM
To: user@cassandra.apache.org
Subject: RE: Bootstrap stuck: vnode enabled 1.2.12


I believe you are talking about CASSANDRA-6685, which was introduced in 1.2.15.

I'm trying to add a node to a production ring. I have added nodes previously just fine. However,
this node had hardware issues during a previous bootstrap, and now even a clean bootstrap
seems to be having problems. Does the ring somehow remember about this node and if so can
I make it forget about it? Decommission/removenode does not work on a node that hasn't yet
bootstrapped.

From: Edward Capriolo [mailto:edlinuxguru@gmail.com]
Sent: Tuesday, February 18, 2014 12:30 PM
To: user@cassandra.apache.org<mailto:user@cassandra.apache.org>
Subject: Re: Bootstrap stuck: vnode enabled 1.2.12

There is a bug where a node without schema can not bootstrap. Do you have schema?

On Tue, Feb 18, 2014 at 1:29 PM, Arindam Barua <abarua@247-inc.com<mailto:abarua@247-inc.com>>
wrote:

The node is still out of the ring. Any suggestions on how to get it in will be very helpful.

From: Arindam Barua [mailto:abarua@247-inc.com<mailto:abarua@247-inc.com>]
Sent: Friday, February 14, 2014 1:04 AM
To: user@cassandra.apache.org<mailto:user@cassandra.apache.org>
Subject: Bootstrap stuck: vnode enabled 1.2.12


After our otherwise successful upgrade procedure to enable vnodes, when adding back "new"
hosts to our cluster, one non-seed host ran into a hardware issue during bootstrap. By the
time the hardware issue was fixed a week later, all other nodes were added successfully, cleaned,
repaired. The disks on this node were untouched, and when the node was started back up, it
detected an interrupted bootstrap, and attempted to bootstrap. However, after ~24 hrs it was
still stuck in the 'JOINING' state according to nodetool netstats on that node, even though
no streams were flowing to/from it. Also, it did not appear in nodetool status in any way/form
(not even as JOINING).

>From couple of observed thread dumps, the stack of the thread blocked during bootstrap
is at [1].

Since the node wasn't making any progress, I ended up stopping Cassandra, cleaning up the
data and commitlog directories, and attempted a fresh bootstrap. Nodetool netstats immediately
reported a whole bunch of streams queued up, and data started streaming to the node. The data
directory quickly grew to 18 GB (the other nodes had ~25GB, but we have lot of data with low
TTLs). However, the node ended up being in the earlier reported state, i.e. nodetool netstats
doesn't have anything queued, but still reports the JOINING state, even though it's been >
24 hrs. There are no other ERRORS in the logs, and new data being written to the cluster makes
it to this node just fine, triggering compactions, etc from time to time.

Any help is appreciated.

Thanks,
Arindam
[1] Thread dump
Thread 3708: (state = BLOCKED)
 - sun.misc.Unsafe.park(boolean, long) @bci=0 (Compiled frame; information may
   be imprecise)
 - java.util.concurrent.locks.LockSupport.park(java.lang.Object) @bci=14,
   line=156 (Interpreted frame)
 - java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt()
   @bci=1, line=811 (Interpreted frame)
 -
   java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireSharedInterruptibly(int)
   @bci=55, line=969 (Interpreted frame)
 -
   java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(int)
   @bci=24, line=1281 (Interpreted frame)
 - java.util.concurrent.CountDownLatch.await() @bci=5, line=207 (Interpreted
   frame)
 - org.apache.cassandra.dht.RangeStreamer.fetch() @bci=209, line=256
   (Interpreted frame)
 - org.apache.cassandra.dht.BootStrapper.bootstrap() @bci=120, line=84
   (Interpreted frame)
 - org.apache.cassandra.service.StorageService.bootstrap(java.util.Collection)
   @bci=172, line=978 (Interpreted frame)
 - org.apache.cassandra.service.StorageService.joinTokenRing(int) @bci=827,
   line=744 (Interpreted frame)
 - org.apache.cassandra.service.StorageService.initServer(int) @bci=363,
   line=585 (Interpreted frame)
 - org.apache.cassandra.service.StorageService.initServer() @bci=4, line=482
   (Interpreted frame)
 - org.apache.cassandra.service.CassandraDaemon.setup() @bci=1069, line=348
   (Interpreted frame)
 - org.apache.cassandra.service.CassandraDaemon.activate() @bci=59, line=447
   (Interpreted frame)
 - org.apache.cassandra.service.CassandraDaemon.main(java.lang.String[]) @bci=3,
   line=490 (Interpreted frame)


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