You are viewing a plain text version of this content. The canonical link for it is here.
Posted to user@cassandra.apache.org by Jean Tremblay <je...@zen-innovations.com> on 2015/06/23 11:05:50 UTC

Datastax Java Driver vs Cassandra 2.1.7

Hi,

I’m using Datastax Java Driver V 2.1.6
I migrated my cluster to Cassandra V2.1.7
And now I have an error on my client that goes like:

2015-06-23 10:49:11.914  WARN 20955 --- [ I/O worker #14] com.datastax.driver.core.RequestHandler  : /192.168.2.201:9042 replied with server error (java.lang.AssertionError), trying next host.

And on the node I have an NPE

ERROR [SharedPool-Worker-1] 2015-06-23 10:56:01,186 Message.java:538 - Unexpected exception during request; channel = [id: 0x5e809aa1, /192.168.2.8:49581 => /192.168.2.201:9042]
java.lang.AssertionError: null
at org.apache.cassandra.cql3.ResultSet.addRow(ResultSet.java:63) ~[apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.cql3.statements.Selection$ResultSetBuilder.newRow(Selection.java:347) ~[apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.cql3.statements.SelectStatement.processColumnFamily(SelectStatement.java:1289) ~[apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.cql3.statements.SelectStatement.process(SelectStatement.java:1223) ~[apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.cql3.statements.SelectStatement.processResults(SelectStatement.java:299) ~[apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:238) ~[apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:67) ~[apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.cql3.QueryProcessor.processStatement(QueryProcessor.java:238) ~[apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.cql3.QueryProcessor.processPrepared(QueryProcessor.java:493) ~[apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.transport.messages.ExecuteMessage.execute(ExecuteMessage.java:134) ~[apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.transport.Message$Dispatcher.channelRead0(Message.java:439) [apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.transport.Message$Dispatcher.channelRead0(Message.java:335) [apache-cassandra-2.1.7.jar:2.1.7]
at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext.access$700(AbstractChannelHandlerContext.java:32) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext$8.run(AbstractChannelHandlerContext.java:324) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_45]
at org.apache.cassandra.concurrent.AbstractTracingAwareExecutorService$FutureTask.run(AbstractTracingAwareExecutorService.java:164) [apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:105) [apache-cassandra-2.1.7.jar:2.1.7]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_45]

Is there a known problem on Cassandra 2.1.7?

Thanks for your comments.

Jean

Re: Datastax Java Driver vs Cassandra 2.1.7

Posted by Jean Tremblay <je...@zen-innovations.com>.
I agree. Thanks a lot.
On 23 Jun 2015, at 15:31 , Sam Tunnicliffe <sa...@beobal.com>> wrote:

Although amending the query is a workaround for this (and duplicating the columns in the selection is not something I imagine one would deliberately do), this is still an ugly regression, so I've opened https://issues.apache.org/jira/browse/CASSANDRA-9636 to fix it.

Thanks,
Sam

On Tue, Jun 23, 2015 at 1:52 PM, Jean Tremblay <je...@zen-innovations.com>> wrote:
Hi Sam,

You have a real good gut feeling.
I went to see the query that I used since many months… which was working…. but obviously there is something wrong with it.
The problem with it was *simply* that I placed twice the same field in the select. I corrected in my code and now I don’t have the error with 2.1.7.

This provocated the error on the nodes:
ERROR [SharedPool-Worker-1] 2015-06-23 10:56:01,186 Message.java:538 - Unexpected exception during request; channel = [id: 0x5e809aa1, /192.168.2.8:49581<http://192.168.2.8:49581/> => /192.168.2.201:9042<http://192.168.2.201:9042/>]
java.lang.AssertionError: null
at org.apache.cassandra.cql3.ResultSet.addRow(ResultSet.java:63) ~[apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.cql3.statements.Selection$ResultSetBuilder.newRow(Selection.java:347) ~[apache-cassandra-2.1.7.jar:2.1.7]

I can also reproduce the error on cqlsh:

cqlsh> select c1, p1, yyyymm, c2, iq, iq from ds.t1 where type='D' and c1=1 and yyyymm>=201401 and yyyymm<=201402 and p1='01';
ServerError: <ErrorMessage code=0000 [Server error] message="java.lang.AssertionError">
cqlsh> select c1, p1, yyyymm, c2, iq  from ds.t1 where type='D' and c1=1 and yyyymm>=201401 and yyyymm<=201402 and p1='01';

 c1     | p1    | yyyymm | c2     | iq
--------+-------+--------+--------+-----------------
      1 |    01 | 201401 |      1 |   {‘XX': 97160}
…

Conclusion… my mistake. Sorry.


On 23 Jun 2015, at 13:06 , Sam Tunnicliffe <sa...@beobal.com>> wrote:

Can you share the query that you're executing when you see the error and the schema of the target table? It could be something related to CASSANDRA-9532.

On Tue, Jun 23, 2015 at 10:05 AM, Jean Tremblay <je...@zen-innovations.com>> wrote:
Hi,

I’m using Datastax Java Driver V 2.1.6
I migrated my cluster to Cassandra V2.1.7
And now I have an error on my client that goes like:

2015-06-23 10:49:11.914  WARN 20955 --- [ I/O worker #14] com.datastax.driver.core.RequestHandler  : /192.168.2.201:9042<http://192.168.2.201:9042/> replied with server error (java.lang.AssertionError), trying next host.

And on the node I have an NPE

ERROR [SharedPool-Worker-1] 2015-06-23 10:56:01,186 Message.java:538 - Unexpected exception during request; channel = [id: 0x5e809aa1, /192.168.2.8:49581<http://192.168.2.8:49581/> => /192.168.2.201:9042<http://192.168.2.201:9042/>]
java.lang.AssertionError: null
at org.apache.cassandra.cql3.ResultSet.addRow(ResultSet.java:63) ~[apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.cql3.statements.Selection$ResultSetBuilder.newRow(Selection.java:347) ~[apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.cql3.statements.SelectStatement.processColumnFamily(SelectStatement.java:1289) ~[apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.cql3.statements.SelectStatement.process(SelectStatement.java:1223) ~[apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.cql3.statements.SelectStatement.processResults(SelectStatement.java:299) ~[apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:238) ~[apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:67) ~[apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.cql3.QueryProcessor.processStatement(QueryProcessor.java:238) ~[apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.cql3.QueryProcessor.processPrepared(QueryProcessor.java:493) ~[apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.transport.messages.ExecuteMessage.execute(ExecuteMessage.java:134) ~[apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.transport.Message$Dispatcher.channelRead0(Message.java:439) [apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.transport.Message$Dispatcher.channelRead0(Message.java:335) [apache-cassandra-2.1.7.jar:2.1.7]
at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext.access$700(AbstractChannelHandlerContext.java:32) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext$8.run(AbstractChannelHandlerContext.java:324) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_45]
at org.apache.cassandra.concurrent.AbstractTracingAwareExecutorService$FutureTask.run(AbstractTracingAwareExecutorService.java:164) [apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:105) [apache-cassandra-2.1.7.jar:2.1.7]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_45]

Is there a known problem on Cassandra 2.1.7?

Thanks for your comments.

Jean





Re: Datastax Java Driver vs Cassandra 2.1.7

Posted by Sam Tunnicliffe <sa...@beobal.com>.
Although amending the query is a workaround for this (and duplicating the
columns in the selection is not something I imagine one would deliberately
do), this is still an ugly regression, so I've opened
https://issues.apache.org/jira/browse/CASSANDRA-9636 to fix it.

Thanks,
Sam

On Tue, Jun 23, 2015 at 1:52 PM, Jean Tremblay <
jean.tremblay@zen-innovations.com> wrote:

>  Hi Sam,
>
>  You have a real good gut feeling.
> I went to see the query that I used since many months… which was working….
> but obviously there is something wrong with it.
> The problem with it was *simply* that I placed twice the same field in the
> select. I corrected in my code and now I don’t have the error with 2.1.7.
>
>  This provocated the error on the nodes:
>
>    ERROR [SharedPool-Worker-1] 2015-06-23 10:56:01,186 Message.java:538 -
>> Unexpected exception during request; channel = [id: 0x5e809aa1, /
>> 192.168.2.8:49581 => /192.168.2.201:9042]
>> java.lang.AssertionError: null
>> at org.apache.cassandra.cql3.ResultSet.addRow(ResultSet.java:63)
>> ~[apache-cassandra-2.1.7.jar:2.1.7]
>> at
>> org.apache.cassandra.cql3.statements.Selection$ResultSetBuilder.newRow(Selection.java:347)
>> ~[apache-cassandra-2.1.7.jar:2.1.7]
>>
>
>>     I can also reproduce the error on cqlsh:
>
>  cqlsh> select c1, p1, yyyymm, c2, iq, iq from ds.t1 where type='D' and
> c1=1 and yyyymm>=201401 and yyyymm<=201402 and p1='01';
>  *ServerError: <ErrorMessage code=0000 [Server error]
> message="java.lang.AssertionError">*
> cqlsh> select c1, p1, yyyymm, c2, iq  from ds.t1 where type='D' and c1=1
> and yyyymm>=201401 and yyyymm<=201402 and p1='01';
>
>    *c1    * | *p1   * | *yyyymm* | *c2    * | *iq*
> --------+-------+--------+--------+-----------------
>       *1* |    *01* | *201401* |      *1* |   *{**‘XX'**: **97160**}*
>  *…*
>
>  *Conclusion… my mistake. Sorry.*
>
>
>   On 23 Jun 2015, at 13:06 , Sam Tunnicliffe <sa...@beobal.com> wrote:
>
>  Can you share the query that you're executing when you see the error and
> the schema of the target table? It could be something related to
> CASSANDRA-9532.
>
> On Tue, Jun 23, 2015 at 10:05 AM, Jean Tremblay <
> jean.tremblay@zen-innovations.com> wrote:
>
>> Hi,
>>
>>  I’m using Datastax Java Driver V 2.1.6
>> I migrated my cluster to Cassandra V2.1.7
>> And now I have an error on my client that goes like:
>>
>>  2015-06-23 10:49:11.914  WARN 20955 --- [ I/O worker #14]
>> com.datastax.driver.core.RequestHandler  : /192.168.2.201:9042 replied
>> with server error (java.lang.AssertionError), trying next host.
>>
>>  And on the node I have an NPE
>>
>>  ERROR [SharedPool-Worker-1] 2015-06-23 10:56:01,186 Message.java:538 -
>> Unexpected exception during request; channel = [id: 0x5e809aa1, /
>> 192.168.2.8:49581 => /192.168.2.201:9042]
>> java.lang.AssertionError: null
>> at org.apache.cassandra.cql3.ResultSet.addRow(ResultSet.java:63)
>> ~[apache-cassandra-2.1.7.jar:2.1.7]
>> at
>> org.apache.cassandra.cql3.statements.Selection$ResultSetBuilder.newRow(Selection.java:347)
>> ~[apache-cassandra-2.1.7.jar:2.1.7]
>> at
>> org.apache.cassandra.cql3.statements.SelectStatement.processColumnFamily(SelectStatement.java:1289)
>> ~[apache-cassandra-2.1.7.jar:2.1.7]
>> at
>> org.apache.cassandra.cql3.statements.SelectStatement.process(SelectStatement.java:1223)
>> ~[apache-cassandra-2.1.7.jar:2.1.7]
>> at
>> org.apache.cassandra.cql3.statements.SelectStatement.processResults(SelectStatement.java:299)
>> ~[apache-cassandra-2.1.7.jar:2.1.7]
>> at
>> org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:238)
>> ~[apache-cassandra-2.1.7.jar:2.1.7]
>> at
>> org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:67)
>> ~[apache-cassandra-2.1.7.jar:2.1.7]
>> at
>> org.apache.cassandra.cql3.QueryProcessor.processStatement(QueryProcessor.java:238)
>> ~[apache-cassandra-2.1.7.jar:2.1.7]
>> at
>> org.apache.cassandra.cql3.QueryProcessor.processPrepared(QueryProcessor.java:493)
>> ~[apache-cassandra-2.1.7.jar:2.1.7]
>> at
>> org.apache.cassandra.transport.messages.ExecuteMessage.execute(ExecuteMessage.java:134)
>> ~[apache-cassandra-2.1.7.jar:2.1.7]
>> at
>> org.apache.cassandra.transport.Message$Dispatcher.channelRead0(Message.java:439)
>> [apache-cassandra-2.1.7.jar:2.1.7]
>> at
>> org.apache.cassandra.transport.Message$Dispatcher.channelRead0(Message.java:335)
>> [apache-cassandra-2.1.7.jar:2.1.7]
>> at
>> io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105)
>> [netty-all-4.0.23.Final.jar:4.0.23.Final]
>> at
>> io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333)
>> [netty-all-4.0.23.Final.jar:4.0.23.Final]
>> at
>> io.netty.channel.AbstractChannelHandlerContext.access$700(AbstractChannelHandlerContext.java:32)
>> [netty-all-4.0.23.Final.jar:4.0.23.Final]
>> at
>> io.netty.channel.AbstractChannelHandlerContext$8.run(AbstractChannelHandlerContext.java:324)
>> [netty-all-4.0.23.Final.jar:4.0.23.Final]
>> at
>> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>> [na:1.8.0_45]
>> at
>> org.apache.cassandra.concurrent.AbstractTracingAwareExecutorService$FutureTask.run(AbstractTracingAwareExecutorService.java:164)
>> [apache-cassandra-2.1.7.jar:2.1.7]
>> at org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:105)
>> [apache-cassandra-2.1.7.jar:2.1.7]
>> at java.lang.Thread.run(Thread.java:745) [na:1.8.0_45]
>>
>>  Is there a known problem on Cassandra 2.1.7?
>>
>>  Thanks for your comments.
>>
>>  Jean
>>
>
>
>

Re: Datastax Java Driver vs Cassandra 2.1.7

Posted by Jean Tremblay <je...@zen-innovations.com>.
Hi Sam,

You have a real good gut feeling.
I went to see the query that I used since many months… which was working…. but obviously there is something wrong with it.
The problem with it was *simply* that I placed twice the same field in the select. I corrected in my code and now I don’t have the error with 2.1.7.

This provocated the error on the nodes:
ERROR [SharedPool-Worker-1] 2015-06-23 10:56:01,186 Message.java:538 - Unexpected exception during request; channel = [id: 0x5e809aa1, /192.168.2.8:49581<http://192.168.2.8:49581/> => /192.168.2.201:9042<http://192.168.2.201:9042/>]
java.lang.AssertionError: null
at org.apache.cassandra.cql3.ResultSet.addRow(ResultSet.java:63) ~[apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.cql3.statements.Selection$ResultSetBuilder.newRow(Selection.java:347) ~[apache-cassandra-2.1.7.jar:2.1.7]

I can also reproduce the error on cqlsh:

cqlsh> select c1, p1, yyyymm, c2, iq, iq from ds.t1 where type='D' and c1=1 and yyyymm>=201401 and yyyymm<=201402 and p1='01';
ServerError: <ErrorMessage code=0000 [Server error] message="java.lang.AssertionError">
cqlsh> select c1, p1, yyyymm, c2, iq  from ds.t1 where type='D' and c1=1 and yyyymm>=201401 and yyyymm<=201402 and p1='01';

 c1     | p1    | yyyymm | c2     | iq
--------+-------+--------+--------+-----------------
      1 |    01 | 201401 |      1 |   {‘XX': 97160}
…

Conclusion… my mistake. Sorry.


On 23 Jun 2015, at 13:06 , Sam Tunnicliffe <sa...@beobal.com>> wrote:

Can you share the query that you're executing when you see the error and the schema of the target table? It could be something related to CASSANDRA-9532.

On Tue, Jun 23, 2015 at 10:05 AM, Jean Tremblay <je...@zen-innovations.com>> wrote:
Hi,

I’m using Datastax Java Driver V 2.1.6
I migrated my cluster to Cassandra V2.1.7
And now I have an error on my client that goes like:

2015-06-23 10:49:11.914  WARN 20955 --- [ I/O worker #14] com.datastax.driver.core.RequestHandler  : /192.168.2.201:9042<http://192.168.2.201:9042/> replied with server error (java.lang.AssertionError), trying next host.

And on the node I have an NPE

ERROR [SharedPool-Worker-1] 2015-06-23 10:56:01,186 Message.java:538 - Unexpected exception during request; channel = [id: 0x5e809aa1, /192.168.2.8:49581<http://192.168.2.8:49581/> => /192.168.2.201:9042<http://192.168.2.201:9042/>]
java.lang.AssertionError: null
at org.apache.cassandra.cql3.ResultSet.addRow(ResultSet.java:63) ~[apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.cql3.statements.Selection$ResultSetBuilder.newRow(Selection.java:347) ~[apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.cql3.statements.SelectStatement.processColumnFamily(SelectStatement.java:1289) ~[apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.cql3.statements.SelectStatement.process(SelectStatement.java:1223) ~[apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.cql3.statements.SelectStatement.processResults(SelectStatement.java:299) ~[apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:238) ~[apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:67) ~[apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.cql3.QueryProcessor.processStatement(QueryProcessor.java:238) ~[apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.cql3.QueryProcessor.processPrepared(QueryProcessor.java:493) ~[apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.transport.messages.ExecuteMessage.execute(ExecuteMessage.java:134) ~[apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.transport.Message$Dispatcher.channelRead0(Message.java:439) [apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.transport.Message$Dispatcher.channelRead0(Message.java:335) [apache-cassandra-2.1.7.jar:2.1.7]
at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext.access$700(AbstractChannelHandlerContext.java:32) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext$8.run(AbstractChannelHandlerContext.java:324) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_45]
at org.apache.cassandra.concurrent.AbstractTracingAwareExecutorService$FutureTask.run(AbstractTracingAwareExecutorService.java:164) [apache-cassandra-2.1.7.jar:2.1.7]
at org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:105) [apache-cassandra-2.1.7.jar:2.1.7]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_45]

Is there a known problem on Cassandra 2.1.7?

Thanks for your comments.

Jean



Re: Datastax Java Driver vs Cassandra 2.1.7

Posted by Sam Tunnicliffe <sa...@beobal.com>.
Can you share the query that you're executing when you see the error and
the schema of the target table? It could be something related to
CASSANDRA-9532.

On Tue, Jun 23, 2015 at 10:05 AM, Jean Tremblay <
jean.tremblay@zen-innovations.com> wrote:

>  Hi,
>
>  I’m using Datastax Java Driver V 2.1.6
> I migrated my cluster to Cassandra V2.1.7
> And now I have an error on my client that goes like:
>
>  2015-06-23 10:49:11.914  WARN 20955 --- [ I/O worker #14]
> com.datastax.driver.core.RequestHandler  : /192.168.2.201:9042 replied
> with server error (java.lang.AssertionError), trying next host.
>
>  And on the node I have an NPE
>
>  ERROR [SharedPool-Worker-1] 2015-06-23 10:56:01,186 Message.java:538 -
> Unexpected exception during request; channel = [id: 0x5e809aa1, /
> 192.168.2.8:49581 => /192.168.2.201:9042]
> java.lang.AssertionError: null
> at org.apache.cassandra.cql3.ResultSet.addRow(ResultSet.java:63)
> ~[apache-cassandra-2.1.7.jar:2.1.7]
> at
> org.apache.cassandra.cql3.statements.Selection$ResultSetBuilder.newRow(Selection.java:347)
> ~[apache-cassandra-2.1.7.jar:2.1.7]
> at
> org.apache.cassandra.cql3.statements.SelectStatement.processColumnFamily(SelectStatement.java:1289)
> ~[apache-cassandra-2.1.7.jar:2.1.7]
> at
> org.apache.cassandra.cql3.statements.SelectStatement.process(SelectStatement.java:1223)
> ~[apache-cassandra-2.1.7.jar:2.1.7]
> at
> org.apache.cassandra.cql3.statements.SelectStatement.processResults(SelectStatement.java:299)
> ~[apache-cassandra-2.1.7.jar:2.1.7]
> at
> org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:238)
> ~[apache-cassandra-2.1.7.jar:2.1.7]
> at
> org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:67)
> ~[apache-cassandra-2.1.7.jar:2.1.7]
> at
> org.apache.cassandra.cql3.QueryProcessor.processStatement(QueryProcessor.java:238)
> ~[apache-cassandra-2.1.7.jar:2.1.7]
> at
> org.apache.cassandra.cql3.QueryProcessor.processPrepared(QueryProcessor.java:493)
> ~[apache-cassandra-2.1.7.jar:2.1.7]
> at
> org.apache.cassandra.transport.messages.ExecuteMessage.execute(ExecuteMessage.java:134)
> ~[apache-cassandra-2.1.7.jar:2.1.7]
> at
> org.apache.cassandra.transport.Message$Dispatcher.channelRead0(Message.java:439)
> [apache-cassandra-2.1.7.jar:2.1.7]
> at
> org.apache.cassandra.transport.Message$Dispatcher.channelRead0(Message.java:335)
> [apache-cassandra-2.1.7.jar:2.1.7]
> at
> io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105)
> [netty-all-4.0.23.Final.jar:4.0.23.Final]
> at
> io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333)
> [netty-all-4.0.23.Final.jar:4.0.23.Final]
> at
> io.netty.channel.AbstractChannelHandlerContext.access$700(AbstractChannelHandlerContext.java:32)
> [netty-all-4.0.23.Final.jar:4.0.23.Final]
> at
> io.netty.channel.AbstractChannelHandlerContext$8.run(AbstractChannelHandlerContext.java:324)
> [netty-all-4.0.23.Final.jar:4.0.23.Final]
> at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> [na:1.8.0_45]
> at
> org.apache.cassandra.concurrent.AbstractTracingAwareExecutorService$FutureTask.run(AbstractTracingAwareExecutorService.java:164)
> [apache-cassandra-2.1.7.jar:2.1.7]
> at org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:105)
> [apache-cassandra-2.1.7.jar:2.1.7]
> at java.lang.Thread.run(Thread.java:745) [na:1.8.0_45]
>
>  Is there a known problem on Cassandra 2.1.7?
>
>  Thanks for your comments.
>
>  Jean
>