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HBase, mail # user - RS crash upon replication


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Re: RS crash upon replication
Varun Sharma 2013-05-22, 21:20
Basically

ls /hbase/rs and what do you see for va-p-02-d ?
On Wed, May 22, 2013 at 2:19 PM, Varun Sharma <[EMAIL PROTECTED]> wrote:

> Can you do ls /hbase/rs and see what you get for 02-d - instead of looking
> in /replication/, could you look in /hbase/replication/rs - I want to see
> if the timestamps are matching or not ?
>
> Varun
>
>
> On Wed, May 22, 2013 at 2:17 PM, Varun Sharma <[EMAIL PROTECTED]> wrote:
>
>> I see - so looks okay - there's just a lot of deep nesting in there - if
>> you look into these you nodes by doing ls - you should see a bunch of
>> WAL(s) which still need to be replicated...
>>
>> Varun
>>
>>
>> On Wed, May 22, 2013 at 2:16 PM, Varun Sharma <[EMAIL PROTECTED]>wrote:
>>
>>> 2013-05-22 15:31:25,929 WARN
>>> org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper: Possibly transient
>>> ZooKeeper exception:
>>> org.apache.zookeeper.KeeperException$SessionExpiredException:
>>> KeeperErrorCode = Session expired for *
>>> /hbase/replication/rs/va-p-hbase-01-c,60020,1369249873379/1-va-p-hbase-01-c,60020,1369042378287-va-p-hbase-02-c,60020,1369042377731-va-p-hbase-02-d,60020,1369233252475/va-p-hbase-01-c%2C60020%2C1369042378287.1369220050719
>>> *
>>> *
>>> *
>>> *01->[01->02->02]->01*
>>>
>>> *Looks like a bunch of cascading failures causing this deep nesting... *
>>>
>>>
>>> On Wed, May 22, 2013 at 2:09 PM, Amit Mor <[EMAIL PROTECTED]>wrote:
>>>
>>>> empty return:
>>>>
>>>> [zk: va-p-zookeeper-01-c:2181(CONNECTED) 10] ls
>>>> /hbase/replication/rs/va-p-hbase-01-c,60020,1369249873379/1
>>>> []
>>>>
>>>>
>>>>
>>>> On Thu, May 23, 2013 at 12:05 AM, Varun Sharma <[EMAIL PROTECTED]>
>>>> wrote:
>>>>
>>>> > Do an "ls" not a get here and give the output ?
>>>> >
>>>> > ls /hbase/replication/rs/va-p-hbase-01-c,60020,1369249873379/1
>>>> >
>>>> >
>>>> > On Wed, May 22, 2013 at 1:53 PM, [EMAIL PROTECTED] <
>>>> > [EMAIL PROTECTED]> wrote:
>>>> >
>>>> > > [zk: va-p-zookeeper-01-c:2181(CONNECTED) 3] get
>>>> > > /hbase/replication/rs/va-p-hbase-01-c,60020,1369249873379/1
>>>> > >
>>>> > > cZxid = 0x60281c1de
>>>> > > ctime = Wed May 22 15:11:17 EDT 2013
>>>> > > mZxid = 0x60281c1de
>>>> > > mtime = Wed May 22 15:11:17 EDT 2013
>>>> > > pZxid = 0x60281c1de
>>>> > > cversion = 0
>>>> > > dataVersion = 0
>>>> > > aclVersion = 0
>>>> > > ephemeralOwner = 0x0
>>>> > > dataLength = 0
>>>> > > numChildren = 0
>>>> > >
>>>> > >
>>>> > >
>>>> > > On Wed, May 22, 2013 at 11:49 PM, Ted Yu <[EMAIL PROTECTED]>
>>>> wrote:
>>>> > >
>>>> > > > What does this command show you ?
>>>> > > >
>>>> > > > get /hbase/replication/rs/va-p-hbase-01-c,60020,1369249873379/1
>>>> > > >
>>>> > > > Cheers
>>>> > > >
>>>> > > > On Wed, May 22, 2013 at 1:46 PM, [EMAIL PROTECTED] <
>>>> > > > [EMAIL PROTECTED]> wrote:
>>>> > > >
>>>> > > > > ls /hbase/replication/rs/va-p-hbase-01-c,60020,1369249873379
>>>> > > > > [1]
>>>> > > > > [zk: va-p-zookeeper-01-c:2181(CONNECTED) 2] ls
>>>> > > > > /hbase/replication/rs/va-p-hbase-01-c,60020,1369249873379/1
>>>> > > > > []
>>>> > > > >
>>>> > > > > I'm on hbase-0.94.2-cdh4.2.1
>>>> > > > >
>>>> > > > > Thanks
>>>> > > > >
>>>> > > > >
>>>> > > > > On Wed, May 22, 2013 at 11:40 PM, Varun Sharma <
>>>> [EMAIL PROTECTED]>
>>>> > > > > wrote:
>>>> > > > >
>>>> > > > > > Also what version of HBase are you running ?
>>>> > > > > >
>>>> > > > > >
>>>> > > > > > On Wed, May 22, 2013 at 1:38 PM, Varun Sharma <
>>>> [EMAIL PROTECTED]
>>>> > >
>>>> > > > > wrote:
>>>> > > > > >
>>>> > > > > > > Basically,
>>>> > > > > > >
>>>> > > > > > > You had va-p-hbase-02 crash - that caused all the
>>>> replication
>>>> > > related
>>>> > > > > > data
>>>> > > > > > > in zookeeper to be moved to va-p-hbase-01 and have it take
>>>> over
>>>> > for
>>>> > > > > > > replicating 02's logs. Now each region server also
>>>> maintains an
>>>> > > > > in-memory
>>>> > > > > > > state of whats in ZK, it seems like when you start up 01,
>>>> its
>>>> > > trying
>>>> > > > to
>>>> > > > > >