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From Sam Tunnicliffe <...@beobal.com>
Subject Re: During writing data into Cassandra 3.7.0 using Python driver 3.7 sometime loose Connection because of Server NullPointerException (Help please!)
Date Fri, 23 Sep 2016 10:06:15 GMT
The stacktrace suggests that when a connection is being established, either
the can_login or is_superuser attribute of the authenticated role is null,
which is definitely a bug as there should be no way to create a role in
that state.

Could you please open a ticket on
https://issues.apache.org/jira/browse/CASSANDRA (including as much detail
as possible)? If you could reply back to this with the ticket # that'd be
helpful for anyone coming across a similar issue in future.

Thanks,
Sam


On Fri, Sep 23, 2016 at 10:33 AM, Rajesh Radhakrishnan <
Rajesh.Radhakrishnan@phe.gov.uk> wrote:

> Hi,
>
>
> In one of our C* cluster we are using the latest Cassandra 3.7.0
> (datastax-ddc.3.70) with Python driver 3.7. We are trying to insert 2
> million row or more data into the database, it works but sometimes we are
> getting "Null pointer Exception". I am quoting  the Exception here.
> Any help would be highly appreciated.
>
> We are using Python 2.7.11 and Java 1.8.0_73 in the Cassandra nodes and in
> the client its Python 2.7.12.
>
> ============================================================
> ======================================================
> ERROR [SharedPool-Worker-6] 2016-09-23 09:42:55,002 Message.java:611 -
> Unexpected exception during request; channel = [id: 0xc208da86,
> L:/IP1.IP2.IP3.IP4:9042 - R:/IP5.IP6.IP7.IP8:58418]
>
> java.lang.NullPointerException: null
>
>     at org.apache.cassandra.serializers.BooleanSerializer.
> deserialize(BooleanSerializer.java:33) ~[apache-cassandra-3.7.0.jar:3.7.0]
>
>     at org.apache.cassandra.serializers.BooleanSerializer.
> deserialize(BooleanSerializer.java:24) ~[apache-cassandra-3.7.0.jar:3.7.0]
>
>     at org.apache.cassandra.db.marshal.AbstractType.compose(AbstractType.java:113)
> ~[apache-cassandra-3.7.0.jar:3.7.0]
>
>     at org.apache.cassandra.cql3.UntypedResultSet$Row.
> getBoolean(UntypedResultSet.java:273) ~[apache-cassandra-3.7.0.jar:3.7.0]
>
>     at org.apache.cassandra.auth.CassandraRoleManager$1.apply(CassandraRoleManager.java:85)
> ~[apache-cassandra-3.7.0.jar:3.7.0]
>
>     at org.apache.cassandra.auth.CassandraRoleManager$1.apply(CassandraRoleManager.java:81)
> ~[apache-cassandra-3.7.0.jar:3.7.0]
>
>     at org.apache.cassandra.auth.CassandraRoleManager.getRoleFromTable(CassandraRoleManager.java:503)
> ~[apache-cassandra-3.7.0.jar:3.7.0]
>
>     at org.apache.cassandra.auth.CassandraRoleManager.getRole(CassandraRoleManager.java:485)
> ~[apache-cassandra-3.7.0.jar:3.7.0]
>
>     at org.apache.cassandra.auth.CassandraRoleManager.canLogin(CassandraRoleManager.java:298)
> ~[apache-cassandra-3.7.0.jar:3.7.0]
>
>     at org.apache.cassandra.service.ClientState.login(ClientState.java:227)
> ~[apache-cassandra-3.7.0.jar:3.7.0]
>
>     at org.apache.cassandra.transport.messages.AuthResponse.execute(AuthResponse.java:79)
> ~[apache-cassandra-3.7.0.jar:3.7.0]
>
>     at org.apache.cassandra.transport.Message$Dispatcher.channelRead0(Message.java:507)
> [apache-cassandra-3.7.0.jar:3.7.0]
>
>     at org.apache.cassandra.transport.Message$Dispatcher.channelRead0(Message.java:401)
> [apache-cassandra-3.7.0.jar:3.7.0]
>
>     at io.netty.channel.SimpleChannelInboundHandler.channelRead(
> SimpleChannelInboundHandler.java:105) [netty-all-4.0.36.Final.jar:4.
> 0.36.Final]
>
>     at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(
> AbstractChannelHandlerContext.java:292) [netty-all-4.0.36.Final.jar:4.
> 0.36.Final]
>
>     at io.netty.channel.AbstractChannelHandlerContext.access$600(
> AbstractChannelHandlerContext.java:32) [netty-all-4.0.36.Final.jar:4.
> 0.36.Final]
>
>     at io.netty.channel.AbstractChannelHandlerContext$7.run(
> AbstractChannelHandlerContext.java:283) [netty-all-4.0.36.Final.jar:4.
> 0.36.Final]
>
>     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> [na:1.8.0_73]
>
>     at org.apache.cassandra.concurrent.AbstractLocalAwareExecutorServ
> ice$FutureTask.run(AbstractLocalAwareExecutorService.java:164)
> [apache-cassandra-3.7.0.jar:3.7.0]
>
>     at org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:105)
> [apache-cassandra-3.7.0.jar:3.7.0]
>
>     at java.lang.Thread.run(Thread.java:745) [na:1.8.0_73]
>
> ERROR [SharedPool-Worker-1] 2016-09-23 09:42:56,238 Message.java:611 -
> Unexpected exception during request; channel = [id: 0x8e2eae00,
> L:/IP1.IP2.IP3.IP4:9042 - R:/IP5.IP6.IP7.IP8:58421]
>
> java.lang.NullPointerException: null
>
>     at org.apache.cassandra.serializers.BooleanSerializer.
> deserialize(BooleanSerializer.java:33) ~[apache-cassandra-3.7.0.jar:3.7.0]
>
>     at org.apache.cassandra.serializers.BooleanSerializer.
> deserialize(BooleanSerializer.java:24) ~[apache-cassandra-3.7.0.jar:3.7.0]
>
>     at org.apache.cassandra.db.marshal.AbstractType.compose(AbstractType.java:113)
> ~[apache-cassandra-3.7.0.jar:3.7.0]
>
>     at org.apache.cassandra.cql3.UntypedResultSet$Row.
> getBoolean(UntypedResultSet.java:273) ~[apache-cassandra-3.7.0.jar:3.7.0]
>
>     at org.apache.cassandra.auth.CassandraRoleManager$1.apply(CassandraRoleManager.java:85)
> ~[apache-cassandra-3.7.0.jar:3.7.0]
>
>     at org.apache.cassandra.auth.CassandraRoleManager$1.apply(CassandraRoleManager.java:81)
> ~[apache-cassandra-3.7.0.jar:3.7.0]
>
>     at org.apache.cassandra.auth.CassandraRoleManager.getRoleFromTable(CassandraRoleManager.java:503)
> ~[apache-cassandra-3.7.0.jar:3.7.0]
>
>     at org.apache.cassandra.auth.CassandraRoleManager.getRole(CassandraRoleManager.java:485)
> ~[apache-cassandra-3.7.0.jar:3.7.0]
>
>     at org.apache.cassandra.auth.CassandraRoleManager.canLogin(CassandraRoleManager.java:298)
> ~[apache-cassandra-3.7.0.jar:3.7.0]
>
>     at org.apache.cassandra.service.ClientState.login(ClientState.java:227)
> ~[apache-cassandra-3.7.0.jar:3.7.0]
>
>     at org.apache.cassandra.transport.messages.AuthResponse.execute(AuthResponse.java:79)
> ~[apache-cassandra-3.7.0.jar:3.7.0]
>
>     at org.apache.cassandra.transport.Message$Dispatcher.channelRead0(Message.java:507)
> [apache-cassandra-3.7.0.jar:3.7.0]
>
>     at org.apache.cassandra.transport.Message$Dispatcher.channelRead0(Message.java:401)
> [apache-cassandra-3.7.0.jar:3.7.0]
>
>     at io.netty.channel.SimpleChannelInboundHandler.channelRead(
> SimpleChannelInboundHandler.java:105) [netty-all-4.0.36.Final.jar:4.
> 0.36.Final]
>
>     at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(
> AbstractChannelHandlerContext.java:292) [netty-all-4.0.36.Final.jar:4.
> 0.36.Final]
>
>     at io.netty.channel.AbstractChannelHandlerContext.access$600(
> AbstractChannelHandlerContext.java:32) [netty-all-4.0.36.Final.jar:4.
> 0.36.Final]
>
>     at io.netty.channel.AbstractChannelHandlerContext$7.run(
> AbstractChannelHandlerContext.java:283) [netty-all-4.0.36.Final.jar:4.
> 0.36.Final]
>
>     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> [na:1.8.0_73]
>
>     at org.apache.cassandra.concurrent.AbstractLocalAwareExecutorServ
> ice$FutureTask.run(AbstractLocalAwareExecutorService.java:164)
> [apache-cassandra-3.7.0.jar:3.7.0]
>
>     at org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:105)
> [apache-cassandra-3.7.0.jar:3.7.0]
>
>     at java.lang.Thread.run(Thread.java:745) [na:1.8.0_73]
> ============================================================
> ======================================================
>
> Thank you.
>
>
> Kind regards,
> Rajesh Radhakrishnan
>
>
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