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HBase, mail # user - HMaster and HRegionServer going down


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Re: HMaster and HRegionServer going down
Azuryy Yu 2013-06-05, 12:19
do you have GC log? and what you did during crash? and whats your gc
options?

for the dn error, thats net work issue generally, because dn received an
incomplete packet.

--Send from my Sony mobile.
On Jun 5, 2013 8:10 PM, "Vimal Jain" <[EMAIL PROTECTED]> wrote:

> Yes.
> Thats true.
> There are some errors in all 3 logs during same period , i.e. data , master
> and region.
> But i am unable to deduce the exact cause of error.
> Can you please help in detecting the problem ?
>
> So far i am suspecting following :-
> I have 1GB heap (default) allocated for all 3 processes , i.e.
> Master,Region,Zookeeper.
> Both  Master and Region took more time for GC ( as inferred from lines in
> logs like "slept more time than configured one" etc ) .
> Due to this there was  zookeeper connection time out for both Master and
> Region and hence both went down.
>
> I am newbie to Hbase and hence may be my findings are not correct.
> I want to be 100 % sure before increasing heap space for both Master and
> Region ( Both around 2GB) to solve this.
> At present i have restarted the cluster with default heap space only ( 1GB
> ).
>
>
>
> On Wed, Jun 5, 2013 at 5:23 PM, Azuryy Yu <[EMAIL PROTECTED]> wrote:
>
> > there have errors in your dats node log, and the error time match with rs
> > log error time.
> >
> > --Send from my Sony mobile.
> > On Jun 5, 2013 5:06 PM, "Vimal Jain" <[EMAIL PROTECTED]> wrote:
> >
> > > I don't think so , as i dont find any issues in data node logs.
> > > Also there are lot of exceptions like "session expired" , "slept more
> > than
> > > configured time" . what are these ?
> > >
> > >
> > > On Wed, Jun 5, 2013 at 2:27 PM, Azuryy Yu <[EMAIL PROTECTED]> wrote:
> > >
> > > > Because your data node 192.168.20.30 broke down. which leads to RS
> > down.
> > > >
> > > >
> > > > On Wed, Jun 5, 2013 at 3:19 PM, Vimal Jain <[EMAIL PROTECTED]> wrote:
> > > >
> > > > > Here is the complete log:
> > > > >
> > > > > http://bin.cakephp.org/saved/103001 - Hregion
> > > > > http://bin.cakephp.org/saved/103000 - Hmaster
> > > > > http://bin.cakephp.org/saved/103002 - Datanode
> > > > >
> > > > >
> > > > > On Wed, Jun 5, 2013 at 11:58 AM, Vimal Jain <[EMAIL PROTECTED]>
> > wrote:
> > > > >
> > > > > > Hi,
> > > > > > I have set up Hbase in pseudo-distributed mode.
> > > > > > It was working fine for 6 days , but suddenly today morning both
> > > > HMaster
> > > > > > and Hregion process went down.
> > > > > > I checked in logs of both hadoop and hbase.
> > > > > > Please help here.
> > > > > > Here are the snippets :-
> > > > > >
> > > > > > *Datanode logs:*
> > > > > > 2013-06-05 05:12:51,436 INFO
> > > > > > org.apache.hadoop.hdfs.server.datanode.DataNode: Exception in
> > > > > receiveBlock
> > > > > > for block blk_1597245478875608321_2818 java.io.EOFException:
> while
> > > > trying
> > > > > > to read 2347 bytes
> > > > > > 2013-06-05 05:12:51,442 INFO
> > > > > > org.apache.hadoop.hdfs.server.datanode.DataNode: writeBlock
> > > > > > blk_1597245478875608321_2818 received exception
> > java.io.EOFException:
> > > > > while
> > > > > > trying to read 2347 bytes
> > > > > > 2013-06-05 05:12:51,442 ERROR
> > > > > > org.apache.hadoop.hdfs.server.datanode.DataNode:
> > > DatanodeRegistration(
> > > > > > 192.168.20.30:50010,
> > > > > > storageID=DS-1816106352-192.168.20.30-50010-1369314076237,
> > > > > infoPort=50075,
> > > > > > ipcPort=50020):DataXceiver
> > > > > > java.io.EOFException: while trying to read 2347 bytes
> > > > > >
> > > > > >
> > > > > > *HRegion logs:*
> > > > > > 2013-06-05 05:12:50,701 WARN
> org.apache.hadoop.hbase.util.Sleeper:
> > We
> > > > > > slept 4694929ms instead of 3000ms, this is likely due to a long
> > > garbage
> > > > > > collecting pause and it's usually bad, see
> > > > > > http://hbase.apache.org/book.html#trouble.rs.runtime.zkexpired
> > > > > > 2013-06-05 05:12:51,045 WARN org.apache.hadoop.hdfs.DFSClient:
> > > > > > DFSOutputStream ResponseProcessor exception  for block
> > > > > > blk_1597245478875608321_2818java.net.SocketTimeoutException: