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From lars hofhansl <lhofha...@yahoo.com>
Subject Re: ANN: The 2nd hbase 0.94.1 release candidate is available for download
Date Thu, 26 Jul 2012 19:45:21 GMT
Thanks Elliot!
I wonder whether this is related to (or the cause of) HBASE-5754?

-- Lars

From: Elliott Clark <eclark@stumbleupon.com>
To: dev@hbase.apache.org; lars hofhansl <lhofhansl@yahoo.com> 
Sent: Thursday, July 26, 2012 12:39 PM
Subject: Re: ANN: The 2nd hbase 0.94.1 release candidate is available for download

On taking it for a spin I'm having issues when I kill the RS and DN that's
holding root.

Spun up a new dfs on hadoop-0.20.2-cdh3u3
Started hbase
started running loadtest tool.
killed rs and dn holding root with killall -9 java on server sv4r27s44 at
about 2012-07-25 22:40:00

After things stabilize Root is in a bad state. Ran hbck and got:
Exception in thread "main"
org.apache.hadoop.hbase.client.NoServerForRegionException: No server
address listed in -ROOT- for region .META.,,1.1028785192 containing row
at org.apache.hadoop.hbase.client.HTable.finishSetup(HTable.java:232)
at org.apache.hadoop.hbase.client.HTable.<init>(HTable.java:172)
at org.apache.hadoop.hbase.util.HBaseFsck.connect(HBaseFsck.java:241)
at org.apache.hadoop.hbase.util.HBaseFsck.main(HBaseFsck.java:3236)

hbase(main):001:0> scan '-ROOT-'
ROW                                           COLUMN+CELL

12/07/25 22:43:18 INFO security.UserGroupInformation: JAAS Configuration
already set up for Hadoop, not re-installing.
.META.,,1                                    column=info:regioninfo,
timestamp=1343255838525, value={NAME => '.META.,,1', STARTKEY => '', ENDKEY
=> '', ENCODED => 1028785192,}
.META.,,1                                    column=info:v,
timestamp=1343255838525, value=\x00\x00

1 row(s) in 0.5930 seconds

Here's the master log: https://gist.github.com/3179194

I tried the same thing with 0.92.1 and I was able to get into a similar
situation, so I don't think this is anything new.  I'm going to file an
issue with what I've seen, since all that was required to fix it was a move
of meta.

On Tue, Jul 24, 2012 at 9:09 PM, lars hofhansl <lhofhansl@yahoo.com> wrote:
> The 2nd 0.94.1 RC is available for download here:
> Signed with my code signing key: A1AC25A9
> 0.94.1 is a bug fix release and has 156 issues resolved against it.
> The full list of changes is available here:
> The tests on the Jenkins machines are stable again and the artifact were
built there.
> Please take the RC for a spin, check out the doc, etc, and vote +1/-1 by
August 7th on whether we should release this as 0.94.1.
> The testing spreadsheet is here:
> Thanks.
> -- Lars

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