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From Josh Elser <>
Subject Re: Intermittent error connecting to Accumulo Instance
Date Tue, 11 Sep 2012 22:55:58 GMT

One ZooKeeper host should be more than enough for 5 servers.

Out of curiosity, did you configure zookeeper to be replicated? In your 
zoo.cfg, did you create "server.X" entries for each ZooKeeper and create 
the myid file in your ZooKeeper dataDir on each host? It sounds like you 
initialized 4 unique ZooKeepers, hit one ZooKeeper on init, and then hit 
another ZooKeeper when you went to connect.

specifically "Running Replicated ZooKeeper" if you do want to run more 
than one ZooKeeper instance.

On 9/11/2012 5:25 PM, Cornish, Duane C. wrote:
> 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
>                  at org.apache.accumulo.core.client.impl.ServerClient.execute(
>                  at org.apache.accumulo.core.client.impl.ConnectorImpl.<init>(
>                  at org.apache.accumulo.core.client.ZooKeeperInstance.getConnector(
>                  at jhuapl.redd.coremax.shared.accumuloInterface.AccumuloConnector.deleteTable(
>                  at jhuapl.redd.coremax.shared.accumuloInterface.TestAccumuloInterface.main(
> Caused by: ThriftSecurityException(user:root, code:INVALID_INSTANCEID)
>                  at org.apache.accumulo.core.client.impl.thrift.ClientService$
>                  at org.apache.accumulo.core.client.impl.thrift.ClientService$Client.recv_authenticateUser(
>                  at org.apache.accumulo.core.client.impl.thrift.ClientService$Client.authenticateUser(
>                  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>                  at sun.reflect.NativeMethodAccessorImpl.invoke(
>                  at sun.reflect.DelegatingMethodAccessorImpl.invoke(
>                  at java.lang.reflect.Method.invoke(
>                  at org.apache.accumulo.cloudtrace.instrument.thrift.TraceWrap$2.invoke(
>                  at $Proxy0.authenticateUser(Unknown Source)
>                  at org.apache.accumulo.core.client.impl.ConnectorImpl$1.execute(
>                  at org.apache.accumulo.core.client.impl.ConnectorImpl$1.execute(
>                  at org.apache.accumulo.core.client.impl.ServerClient.executeRaw(
>                  at org.apache.accumulo.core.client.impl.ServerClient.execute(
>                  ... 4 more
> Any help would be greatly appreciated!
> Thanks,
> Duane

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