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HBase >> mail # dev >> 0.96.0 keep logging "Memstore is above high water mark"


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Jean-Marc Spaggiari 2013-09-02, 19:04
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Re: 0.96.0 keep logging "Memstore is above high water mark"
On Mon, Sep 2, 2013 at 12:04 PM, Jean-Marc Spaggiari <
[EMAIL PROTECTED]> wrote:

> While running PE with 10 clients, server keep logging:
> 2013-09-02 14:56:59,919 WARN  [RpcServer.handler=5,port=44439]
> regionserver.MemStoreFlusher: Memstore is above high water mark and
> block 2362ms
> 2013-09-02 14:56:59,919 WARN  [RpcServer.handler=18,port=44439]
> regionserver.MemStoreFlusher: Memstore is above high water mark and
> block 2363ms
>

Yeah that was added in HBASE-6466, it helps tracing when the handlers are
blocked on the memstores, else you have to match the "Blocking updates"
with the "Unblocking updates" lines. I'd just be fine adding the time into
the "Unblocking updates" line and remove that WARN.
>
> Then when test is over:
> 2013-09-02 14:57:02,280 WARN
> [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181] server.NIOServerCnxn:
> caught end of stream exception
> EndOfStreamException: Unable to read additional data from client
> sessionid 0x140dfdfc6270044, likely client has closed socket
>     at
> org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:220)
>     at
> org.apache.zookeeper.server.NIOServerCnxnFactory.run(NIOServerCnxnFactory.java:208)
>     at java.lang.Thread.run(Thread.java:662)
>

Your 10 clients are disconnecting from ZK, you're letting HBase manage it?
>
> /hbase-0.96.0$ cat logs/hbase-jmspaggiari-master-t430s.log  | grep
> "Memstore is above high water mark and block" | wc
>    3555   49770  514558
>
>
> /hbase-0.96.0$ cat logs/hbase-jmspaggiari-master-t430s.log  | grep
> "Unable to read additional data from client sessionid" | wc
>     102    1530   12852
>
> I guess it's only because of PE, but is this something which need to
> be looked at?
>
> JM
>
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Kevin Odell 2013-09-03, 17:30
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Jean-Marc Spaggiari 2013-09-03, 17:35
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Jean-Daniel Cryans 2013-09-03, 17:47
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Kevin Odell 2013-09-03, 17:53
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Jean-Marc Spaggiari 2013-09-03, 17:50
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Jean-Daniel Cryans 2013-09-03, 18:00
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Jean-Marc Spaggiari 2013-09-03, 18:14
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Jean-Daniel Cryans 2013-09-03, 18:38
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Jean-Marc Spaggiari 2013-09-03, 20:57
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Jean-Marc Spaggiari 2013-09-03, 21:08
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Jean-Daniel Cryans 2013-09-03, 21:48
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Jean-Marc Spaggiari 2013-09-03, 22:16
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Jean-Daniel Cryans 2013-09-03, 22:21
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Jean-Marc Spaggiari 2013-09-04, 12:05
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Jean-Daniel Cryans 2013-09-03, 17:45
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Frank Chow 2013-09-04, 12:32