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HBase, mail # dev - Re: infinite loop of RS_ZK_REGION_SPLIT on .94.2


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Re: infinite loop of RS_ZK_REGION_SPLIT on .94.2
Matt Corgan 2012-11-05, 22:02
Here's one from last night with the master logs at the bottom.
http://pastebin.com/cSdMbA2a

I don't see that region in the master logs for 4 days back.  I'm going to
import some new data from scratch soon and will be sure to keep all the
master logs.
On Mon, Nov 5, 2012 at 9:52 AM, Jean-Daniel Cryans <[EMAIL PROTECTED]>wrote:

> This reminds me a lot of https://issues.apache.org/jira/browse/HBASE-4792
>
> What I'd like to see is the log from the first time the master
> receives the split message. I guess it says the region doesn't exist
> anymore because the split was processed already in the master but
> there's a failure mode similar to 4792.
>
> I saw this on another cluster last week but the logs were rolling
> based on size so the original split message was lost.
>
> J-D
>
> On Sun, Nov 4, 2012 at 5:16 PM, Matt Corgan <[EMAIL PROTECTED]> wrote:
> > I've had a few successful splits today without any errors.  I'll turn up
> > the importer speed tomorrow to start stressing the cluster more.
> >
> >
> > On Sun, Nov 4, 2012 at 2:07 PM, Ted Yu <[EMAIL PROTECTED]> wrote:
> >
> >> Matt:
> >> Was there any region server crash before you noticed the repeated log
> for
> >> bc62a8a72124a4ba3f6b9f302587903c ?
> >>
> >> I wonder if the following JIRA might be related:
> >> HBASE-7083 SSH#fixupDaughter should force re-assign missing daughter
> >>
> >> Thanks
> >>
> >> On Sat, Nov 3, 2012 at 7:27 PM, Matt Corgan <[EMAIL PROTECTED]>
> wrote:
> >>
> >> > Strangely, I don't see any record of that region in the master before
> >> what
> >> > I already pasted even though I have logs back to 10/30.  Next time it
> >> > happens I'll gather a full log record and try to debug while it's
> >> > occurring.
> >> >
> >> >
> >> > On Sat, Nov 3, 2012 at 7:10 PM, rajesh babu chintaguntla <
> >> > [EMAIL PROTECTED]> wrote:
> >> >
> >> > > Hi Matt,
> >> > > can you paste some more master logs of region
> >> > > bc62a8a72124a4ba3f6b9f30258790 before split.
> >> > > I think Its not problem with splitting.
> >> > > We are getting
> >> > >       LOG.warn("Region " + encodedName + " not found on server " +
> >> > > serverName +
> >> > >         "; failed processing");
> >> > > this log means no entry in servers map(not fully assigned).
> >> > >     Set<HRegionInfo> hris = this.servers.get(sn);
> >> > >     HRegionInfo foundHri = null;
> >> > >     for (HRegionInfo hri: hris) {
> >> > >       if (hri.getEncodedName().equals(encodedName)) {
> >> > >         foundHri = hri;
> >> > >         break;
> >> > >       }
> >> > >     }
> >> > >     return foundHri;
> >> > >
> >> > >
> >> > >
> >> > >
> >> > > On Sun, Nov 4, 2012 at 6:07 AM, lars hofhansl <[EMAIL PROTECTED]>
> >> > wrote:
> >> > >
> >> > > > CC'ing dev list...
> >> > > >
> >> > > > Is anybody aware of any changes that went in recently that could
> >> cause
> >> > > > this?
> >> > > > I looked around a bit, but could not find anything obvious.
> >> > > >
> >> > > > -- Lars
> >> > > >
> >> > > >
> >> > > >
> >> > > > ________________________________
> >> > > >  From: Matt Corgan <[EMAIL PROTECTED]>
> >> > > > To: user <[EMAIL PROTECTED]>
> >> > > > Sent: Saturday, November 3, 2012 5:27 PM
> >> > > > Subject: Re: infinite loop of RS_ZK_REGION_SPLIT on .94.2
> >> > > >
> >> > > > I think the cluster is ok without running hbck, as restarting the
> >> > > > regionserver process stops the warnings and everything looks ok
> >> > > otherwise.
> >> > > >
> >> > > > here's the regionserver right after the split happens:
> >> > > > ------------------------
> >> > > > 2012-11-01 22:45:28,726 DEBUG
> >> > org.apache.hadoop.hbase.zookeeper.ZKAssign:
> >> > > > regionserver:60020-0x13ab46479832953 Attempting to transition node
> >> > > > bc62a8a72124a4ba3f6b9f302587903c from *RS_ZK_R*
> >> > > > *EGION_SPLITTING to RS_ZK_REGION_SPLIT*
> >> > > > 2012-11-01 22:45:28,730 DEBUG
> >> > org.apache.hadoop.hbase.zookeeper.ZKAssign:
> >> > > > regionserver:60020-0x13ab46479832953 Successfully transitioned