w.r.t. the strange error mentioned at the bottom of the email, it came
from connectionEvent():
if (this.recoverableZooKeeper == null) {
LOG.error("ZK is null on connection event -- see stack trace " +
"for the stack trace when constructor was called on this zkw",
this.constructorCaller);
throw new NullPointerException("ZK is null");
}
this.constructorCaller was filled out in the constructor.
The error indicated that the following call wasn't successful (line 153 in
ZooKeeperWatcher ctor)
this.recoverableZooKeeper = ZKUtil.connect(conf, quorum, this,
descriptor);
Can you check more of the RS log ?
zookeeper log may reveal something as well.
Cheers
On Fri, Jul 12, 2013 at 3:32 PM, Adrien Mogenet <[email protected]>wrote:
> Hi there,
>
> I'm trying to upgrade from 0.94.6 (distributed mode) to 0.94.8 and I'm
> seeing strange WARN messages leading in region-less regionserver once
> updated.
>
> Here is the kind of lines I can find:
>
> > WARN org.apache.hadoop.hbase.zookeeper.ZKAssign:
> regionserver:60020-0x23d207e751d20c4 Attempt to transition the unassigned
> node for 9a
> eb2d2c3e878ee50ad4806dd3488c15 from M_ZK_REGION_OFFLINE to
> RS_ZK_REGION_OPENING failed, the node existed but was in the state
> M_SERVER_SHUTDOWN set by the server my-server.org,60020,1373289114184
>
> I've uploaded a longer extract including DEBUG traces to Pastebin:
> http://pastebin.com/raw.php?i=Me2esbPF
>
> I've performed as usual: stopping the RS, updating HBase binaries and
> libraries, then starting the RS... When digging into the log file, I can
> read one strange error ZK-related ("ZKW CONSTRUCTOR STACK TRACE FOR
> DEBUGGING"), see complete trace here:
> http://pastebin.com/raw.php?i=7wy0wdNq
>
> Any idea?
> --
> Adrien Mogenet
> http://www.borntosegfault.com
>
