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HBase >> mail # user >> HMaster and HRegionServer going down


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Re: HMaster and HRegionServer going down
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: