hbase-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Matt Corgan <mcor...@hotpads.com>
Subject Re: infinite loop of RS_ZK_REGION_SPLIT on .94.2
Date Mon, 05 Nov 2012 22:02:17 GMT
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 <jdcryans@apache.org>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 <mcorgan@hotpads.com> 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 <yuzhihong@gmail.com> 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 <mcorgan@hotpads.com>
> 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 <
> >> > chrajeshbabu32@gmail.com> 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 <lhofhansl@yahoo.com>
> >> > 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 <mcorgan@hotpads.com>
> >> > > > To: user <user@hbase.apache.org>
> >> > > > 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
> node
> >> > > > bc62a8a72124a4ba3f6b9f302587903c from RS_ZK_
> >> > > > REGION_SPLITTING to RS_ZK_REGION_SPLIT
> >> > > > 2012-11-01 22:45:28,730 DEBUG
> >> > > > org.apache.hadoop.hbase.regionserver.SplitTransaction: Still
> waiting
> >> on
> >> > > the
> >> > > > master to process the split for bc62a8a72124a4ba3f6b9f302587903c
> >> > > > 2012-11-01 22:45:28,832 DEBUG
> >> > org.apache.hadoop.hbase.zookeeper.ZKAssign:
> >> > > > regionserver:60020-0x13ab46479832953 Attempting to transition
node
> >> > > > bc62a8a72124a4ba3f6b9f302587903c from RS_ZK_R
> >> > > > EGION_SPLIT to RS_ZK_REGION_SPLIT
> >> > > > 2012-11-01 22:45:28,837 DEBUG
> >> > org.apache.hadoop.hbase.zookeeper.ZKAssign:
> >> > > > regionserver:60020-0x13ab46479832953 Successfully transitioned
> node
> >> > > > bc62a8a72124a4ba3f6b9f302587903c from RS_ZK_
> >> > > > REGION_SPLIT to RS_ZK_REGION_SPLIT
> >> > > > -----------------------------
> >> > > >
> >> > > > The "transitioned node from RS_ZK_REGION_SPLIT to
> RS_ZK_REGION_SPLIT"
> >> > > > continues for 15 or so hours and finally settles without manual
> >> > > > intervention with these regionserver log messages:
> >> > > > -----------------------
> >> > > > 2012-11-02 13:55:00,906 DEBUG
> >> > org.apache.hadoop.hbase.zookeeper.ZKAssign:
> >> > > > regionserver:60020-0x13ab46479832953 Attempting to transition
> node *
> >> > > > bc62a8a72124a4ba3f6b9f302587903c* from RS_ZK_REGION_SPLIT to
> >> > > > RS_ZK_REGION_SPLIT
> >> > > >
> >> > > > 2012-11-02 13:55:00,916 DEBUG
> >> > org.apache.hadoop.hbase.zookeeper.ZKAssign:
> >> > > > regionserver:60020-0x13ab46479832953 Successfully transitioned
> node *
> >> > > > bc62a8a72124a4ba3f6b9f302587903c* from RS_ZK_REGION_SPLIT to
> >> > > > RS_ZK_REGION_SPLIT
> >> > > >
> >> > > > 2012-11-02 13:55:00,916 INFO
> >> > > > org.apache.hadoop.hbase.regionserver.SplitRequest: Region split,
> META
> >> > > > updated, and report to master.
> >> > > >
> >> > > >
> >> > >
> >> >
> >>
> Parent=ActiveListingRecord16,\x83\x07\xDC\x07\x01Obeo\x00690461,1351816858693.
> >> > > > *bc62a8a72124a4ba3f6b9f302587903c*., new regions:
> >> > > >
> >> > > >
> >> > >
> >> >
> >>
> ActiveListingRecord16,\x83\x07\xDC\x07\x01Obeo\x00690461,1351824327023.22c3fa48d17aa7312ca53566c680f0fd.,
> >> > > >
> >> > > >
> >> > >
> >> >
> >>
> ActiveListingRecord16,\x83\x07\xDC\x07\x11WebsiteIDX\x009024215,1351824327023.b0e0a488c711e5c7f74ee6198a9755a2..
> >> > > > Split took 15hrs, 9mins, 33sec
> >> > > >
> >> > > > 2012-11-02 13:55:00,945 INFO
> >> > > > org.apache.hadoop.hbase.regionserver.SplitRequest: Region split,
> META
> >> > > > updated, and report to master.
> >> > > >
> >> > > >
> >> > >
> >> >
> >>
> Parent=ActiveListingRecord16,\x83\x07\xDC\x06\x0EThreeWide\x00SWMRIC-11001540,1351790329631.f720436a6f8fd412d76fe3255f24e3b3.,
> >> > > > new regions:
> >> > > >
> >> > > >
> >> > >
> >> >
> >>
> ActiveListingRecord16,\x83\x07\xDC\x06\x0EThreeWide\x00SWMRIC-11001540,1351816858693.2880cf893175d2a852947c63ee8554a3.,
> >> > > >
> >> >
> ActiveListingRecord16,\x83\x07\xDC\x07\x01Obeo\x00690461,1351816858693.*
> >> > > > bc62a8a72124a4ba3f6b9f302587903c*.. Split took 17hrs, 14mins,
2sec
> >> > > > ----------------------
> >> > > >
> >> > > > And the master finally logs this:
> >> > > > -----------------------
> >> > > > 2012-11-02 13:55:00,783 WARN
> >> > > > org.apache.hadoop.hbase.master.AssignmentManager: Region
> >> > > > bc62a8a72124a4ba3f6b9f302587903c not found on server
> >> > > > HadoopNode162.hotpads.srv,60020,1351788248279; failed processing
> >> > > >
> >> > > > 2012-11-02 13:55:00,783 WARN
> >> > > > org.apache.hadoop.hbase.master.AssignmentManager: Received SPLIT
> for
> >> > > region
> >> > > > bc62a8a72124a4ba3f6b9f302587903c from server
> >> > > > HadoopNode162.hotpads.srv,60020,1351788248279 but it doesn't
exist
> >> > > anymore,
> >> > > > probably already processed its split
> >> > > > ------------------------
> >> > > >
> >> > > > I can't find any evidence that the region left the node during
> that
> >> > time.
> >> > > > I'll have to catch it in action next time and see what the region
> is
> >> up
> >> > > to
> >> > > > during the problem period.
> >> > > >
> >> > > > What does it mean that it successfully transitioned from SPLIT
to
> >> > SPLIT?
> >> > > > Is that a valid transition?
> >> > > >
> >> > > > Matt
> >> > > >
> >> > > >
> >> > > >
> >> > > > On Sat, Nov 3, 2012 at 2:55 PM, Ted Yu <yuzhihong@gmail.com>
> wrote:
> >> > > >
> >> > > > > Matt:
> >> > > > > From the following we can see that region
> >> > > > bc62a8a72124a4ba3f6b9f302587903c
> >> > > > > cannot be found:
> >> > > > >
> >> > > > > 2012-11-02 00:00:02,909 DEBUG
> >> > > > > org.apache.hadoop.hbase.master.AssignmentManager: Handling
> >> > > > > transition=RS_ZK_REGION_SPLIT,
> >> > > > > server=HadoopNode162.hotpads.srv,60020,1351788248279,
> >> > > > > region=bc62a8a72124a4ba3f6b9f302587903c
> >> > > > > 2012-11-02 00:00:02,909 WARN
> >> > > > > org.apache.hadoop.hbase.master.AssignmentManager: Region
> >> > > > > bc62a8a72124a4ba3f6b9f302587903c *not found on server
> >> > > > > HadoopNode162.hotpads*.srv,60020,1351788248279;failed
> >> > > > > processing
> >> > > > > 2012-11-02 00:00:02,909 WARN
> >> > > > > org.apache.hadoop.hbase.master.AssignmentManager: Received
SPLIT
> >> for
> >> > > > region
> >> > > > > bc62a8a72124a4ba3f6b9f302587903c from server
> >> > > > > HadoopNode162.hotpads.srv,60020,1351788248279 but it doesn't
> exist
> >> > > > anymore,
> >> > > > > probably already processed its split
> >> > > > >
> >> > > > > Have you run hbck to repair your cluster ?
> >> > > > >
> >> > > > > Thanks
> >> > > > >
> >> > > > > On Sat, Nov 3, 2012 at 2:29 PM, Matt Corgan <
> mcorgan@hotpads.com>
> >> > > wrote:
> >> > > > >
> >> > > > > > Here's a sample of the master's logs from yesterday.
 It's not
> >> > > > correlated
> >> > > > > > exactly with the other pastebin log, but there's 3GB
of this
> from
> >> > > > > > yesterday: http://pastebin.com/wP2rNN1t
> >> > > > > >
> >> > > > > > I'm am pushing the cluster a bit with importing data
so
> testing
> >> the
> >> > > > split
> >> > > > > > code harder than normal.  The regions are 500-1GB gzipped.
 I
> can
> >> > > look
> >> > > > > into
> >> > > > > > it more but trying to figure out what to look for.
> >> > > > > >
> >> > > > > > Thanks Ted,
> >> > > > > > Matt
> >> > > > > >
> >> > > > > >
> >> > > > > > On Sat, Nov 3, 2012 at 2:03 PM, Ted Yu <yuzhihong@gmail.com>
> >> > wrote:
> >> > > > > >
> >> > > > > > > Matt:
> >> > > > > > > This is the method which made the logging:
> >> > > > > > >   private static int tickleNodeSplit(ZooKeeperWatcher
zkw,
> >> > > > > > >       HRegionInfo parent, HRegionInfo a, HRegionInfo
b,
> >> > ServerName
> >> > > > > > > serverName,
> >> > > > > > >       final int znodeVersion)
> >> > > > > > >   throws KeeperException, IOException {
> >> > > > > > >     byte [] payload = Writables.getBytes(a, b);
> >> > > > > > >     return ZKAssign.transitionNode(zkw, parent,
serverName,
> >> > > > > > >       EventType.RS_ZK_REGION_SPLIT,
> >> EventType.RS_ZK_REGION_SPLIT,
> >> > > > > > >       znodeVersion, payload);
> >> > > > > > >   }
> >> > > > > > >
> >> > > > > > > transitionZKNode() calls tickleNodeSplit() when
waiting for
> >> > master
> >> > > to
> >> > > > > > split
> >> > > > > > > the region. Obviously something caused the master
not able
> to
> >> > > split.
> >> > > > > > >
> >> > > > > > > How large is the region ?
> >> > > > > > >
> >> > > > > > > Can you pastebin master log for that period of
time ?
> >> > > > > > >
> >> > > > > > > Thanks
> >> > > > > > >
> >> > > > > > > On Sat, Nov 3, 2012 at 1:54 PM, Matt Corgan <
> >> mcorgan@hotpads.com
> >> > >
> >> > > > > wrote:
> >> > > > > > >
> >> > > > > > > > We upgraded from .94.0 to .94.2 last week
and have
> started to
> >> > > > > encounter
> >> > > > > > > > infinite loops of region-transition on splits.
 I'm not
> sure
> >> > yet
> >> > > if
> >> > > > > > it's
> >> > > > > > > > all splits nor if it's related to load. 
Solution so far
> has
> >> > been
> >> > > > to
> >> > > > > > > > restart the regionserver process.
> >> > > > > > > >
> >> > > > > > > > log snippet:
> >> > > > > > > > http://pastebin.com/LpienZ7B
> >> > > > > > > >
> >> > > > > > > > It's repeating these two lines:
> >> > > > > > > > 2012-11-02 01:35:33,312 DEBUG
> >> > > > > > org.apache.hadoop.hbase.zookeeper.ZKAssign:
> >> > > > > > > > regionserver:60020-0x13ab46479832b76 Attempting
to
> transition
> >> > > node
> >> > > > > > > > cf3e9bc069e1888983c06dc8e053ffcf from RS_ZK_REGION_SPLIT
> to
> >> > > > > > > > RS_ZK_REGION_SPLIT
> >> > > > > > > > 2012-11-02 01:35:33,364 DEBUG
> >> > > > > > org.apache.hadoop.hbase.zookeeper.ZKAssign:
> >> > > > > > > > regionserver:60020-0x13ab46479832b76 Successfully
> >> transitioned
> >> > > node
> >> > > > > > > > cf3e9bc069e1888983c06dc8e053ffcf from RS_ZK_REGION_SPLIT
> to
> >> > > > > > > > RS_ZK_REGION_SPLIT
> >> > > > > > > >
> >> > > > > > > > with the occasional:
> >> > > > > > > > 2012-11-02 01:35:34,476 DEBUG
> >> > > > > > > > org.apache.hadoop.hbase.regionserver.SplitTransaction:
> Still
> >> > > > waiting
> >> > > > > on
> >> > > > > > > the
> >> > > > > > > > master to process the split for
> >> > cf3e9bc069e1888983c06dc8e053ffcf
> >> > > > > > > >
> >> > > > > > > > Should the region transition from RS_ZK_REGION_SPLIT
to
> >> itself?
> >> > >  It
> >> > > > > > looks
> >> > > > > > > > wrong, but I'm not familiar with the code
at all.
> >> > > > > > > >
> >> > > > > > > > Thanks,
> >> > > > > > > > Matt
> >> > > > > > > >
> >> > > > > > >
> >> > > > > >
> >> > > > >
> >> > > >
> >> > >
> >> >
> >>
>

Mime
  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message