-Re: Intermittent error connecting to Accumulo Instance
Adam Fuchs 2012-09-11, 21:43
The INVALID_INSTANCEID message implies that your client is trying to
contact a server that thinks the instance id is something else. The 1 out
of 5 likelihood probably indicates that one out of the five server
processes (one master and four tablet servers) has some misconfiguration.
When you do a "deleteTable" operation, the client code will get the list of
active servers and pick one at random. This would seem to imply that
zookeeper is configured correctly across your cluster.
Tablet servers read their instance name and ID out of the accumulo
directory in HDFS. I wonder if this could be caused by something like HDFS
not being configured the same on one of the tablet servers, so when it
launches it doesn't get the right instance ID? (I'm thinking out loud here)
Do you see any warning or error messages propagating to your monitor page?
On Tue, Sep 11, 2012 at 5:25 PM, Cornish, Duane C. <[EMAIL PROTECTED]
> I stood up a 4 node Accumulo Cloud. I wrote a Java interface to it and
> when I attempt to connect to the table through my interface, I'm getting an
> intermittent error that only pops up maybe 1 out of every 5 runs of the
> code. I have zookeeper running on all 4 nodes but in my accumulo config
> file, I only mentioned the one on the Accumulo name node. I don't know if
> that would be a problem or not. Also, the zookeeper stuff is all owned by
> root, while hadoop and Accumulo are owned by a different non-root user. I
> built this cluster from the ground up (i.e. didn't use Cloudera, etc.), so
> it's possible that I missed something.
> I'm running Accumulo 1.4.1 with hadoop 1.0.3 and zookeeper 3.3.6.
> As you can see from the error below, it is saying that I have an
> INVALID_INSTANCEID. However my instance (and credentials) are static final
> Strings and are not changing. I haven't had any trouble connecting to the
> instance via the shell. Also, the monitor webpage works just fine and
> shows no errors.
> Here is the error below:
> Exception in thread "main"
> org.apache.accumulo.core.client.AccumuloSecurityException: Error
> INVALID_INSTANCEID - Unknown security exception
> Caused by: ThriftSecurityException(user:root, code:INVALID_INSTANCEID)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native
> at java.lang.reflect.Method.invoke(Method.java:616)
> at $Proxy0.authenticateUser(Unknown Source)