[
https://issues.apache.org/jira/browse/CASSANDRA-12700?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Rajesh Radhakrishnan updated CASSANDRA-12700:
---------------------------------------------
Description:
In 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, 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.
===========================================================
Cassandra Server log ===========================================================
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.AbstractLocalAwareExecutorService$FutureTask.run(AbstractLocalAwareExecutorService.java:164)
[apache-cassandra-3.7.0.jar:3.7.0]
at org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:105)
[apache-cassandra-3.7.0.jar:3.7.0]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_73]
ERROR [SharedPool-Worker-1] 2016-09-23 09:42:56,238 Message.java:611 -
Unexpected exception during request; channel = [id: 0x8e2eae00,
L:/IP1.IP2.IP3.IP4:9042 - R:/IP5.IP6.IP7.IP8:58421]
java.lang.NullPointerException: null
at
org.apache.cassandra.serializers.BooleanSerializer.deserialize(BooleanSerializer.java:33)
~[apache-cassandra-3.7.0.jar:3.7.0]
at
org.apache.cassandra.serializers.BooleanSerializer.deserialize(BooleanSerializer.java:24)
~[apache-cassandra-3.7.0.jar:3.7.0]
at
org.apache.cassandra.db.marshal.AbstractType.compose(AbstractType.java:113)
~[apache-cassandra-3.7.0.jar:3.7.0]
at
org.apache.cassandra.cql3.UntypedResultSet$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.AbstractLocalAwareExecutorService$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]
===========================================================
=============================================================
Python client Error =======================================================
Traceback (most recent call last):
File "vssandra_v5.py", line 132, in <module>
db.insert_batch()
File "vssandra_v5.py", line 60, in insert_batch
self.session.execute(self.batch, timeout=None)
File "cassandra/cluster.py", line 1998, in cassandra.cluster.Session.execute
(cassandra/cluster.c:34869)
File "cassandra/cluster.py", line 3781, in
cassandra.cluster.ResponseFuture.result (cassandra/cluster.c:73073)
cassandra.protocol.ServerError: <Error from server: code=0000 [Server error]
message="com.google.common.util.concurrent.UncheckedExecutionException:
com.google.common.util.concurrent.UncheckedExecutionException:
java.lang.NullPointerException">
===========================================================
was:
In 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, 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.AbstractLocalAwareExecutorService$FutureTask.run(AbstractLocalAwareExecutorService.java:164)
[apache-cassandra-3.7.0.jar:3.7.0]
at org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:105)
[apache-cassandra-3.7.0.jar:3.7.0]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_73]
ERROR [SharedPool-Worker-1] 2016-09-23 09:42:56,238 Message.java:611 -
Unexpected exception during request; channel = [id: 0x8e2eae00,
L:/IP1.IP2.IP3.IP4:9042 - R:/IP5.IP6.IP7.IP8:58421]
java.lang.NullPointerException: null
at
org.apache.cassandra.serializers.BooleanSerializer.deserialize(BooleanSerializer.java:33)
~[apache-cassandra-3.7.0.jar:3.7.0]
at
org.apache.cassandra.serializers.BooleanSerializer.deserialize(BooleanSerializer.java:24)
~[apache-cassandra-3.7.0.jar:3.7.0]
at
org.apache.cassandra.db.marshal.AbstractType.compose(AbstractType.java:113)
~[apache-cassandra-3.7.0.jar:3.7.0]
at
org.apache.cassandra.cql3.UntypedResultSet$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.AbstractLocalAwareExecutorService$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]
==================================================================================================================
> During writing data into Cassandra 3.7.0 using Python driver 3.7 sometimes
> Connection get lost, because of Server NullPointerException
> --------------------------------------------------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-12700
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12700
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Environment: Cassandra cluster with two nodes running C* version
> 3.7.0 and Python Driver 3.7 using Python 2.7.11.
> OS: Red Hat Enterprise Linux 6.x x64,
> RAM :8GB
> DISK :210GB
> Cores: 2
> Java 1.8.0_73 JRE
> Reporter: Rajesh Radhakrishnan
> Fix For: 3.7
>
>
> In 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, 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.
> ===========================================================
> Cassandra Server log
> ===========================================================
> 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.AbstractLocalAwareExecutorService$FutureTask.run(AbstractLocalAwareExecutorService.java:164)
> [apache-cassandra-3.7.0.jar:3.7.0]
> at org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:105)
> [apache-cassandra-3.7.0.jar:3.7.0]
> at java.lang.Thread.run(Thread.java:745) [na:1.8.0_73]
> ERROR [SharedPool-Worker-1] 2016-09-23 09:42:56,238 Message.java:611 -
> Unexpected exception during request; channel = [id: 0x8e2eae00,
> L:/IP1.IP2.IP3.IP4:9042 - R:/IP5.IP6.IP7.IP8:58421]
> java.lang.NullPointerException: null
> at
> org.apache.cassandra.serializers.BooleanSerializer.deserialize(BooleanSerializer.java:33)
> ~[apache-cassandra-3.7.0.jar:3.7.0]
> at
> org.apache.cassandra.serializers.BooleanSerializer.deserialize(BooleanSerializer.java:24)
> ~[apache-cassandra-3.7.0.jar:3.7.0]
> at
> org.apache.cassandra.db.marshal.AbstractType.compose(AbstractType.java:113)
> ~[apache-cassandra-3.7.0.jar:3.7.0]
> at
> org.apache.cassandra.cql3.UntypedResultSet$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.AbstractLocalAwareExecutorService$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]
> ===========================================================
> =============================================================
> Python client Error =======================================================
> Traceback (most recent call last):
> File "vssandra_v5.py", line 132, in <module>
> db.insert_batch()
> File "vssandra_v5.py", line 60, in insert_batch
> self.session.execute(self.batch, timeout=None)
> File "cassandra/cluster.py", line 1998, in cassandra.cluster.Session.execute
> (cassandra/cluster.c:34869)
> File "cassandra/cluster.py", line 3781, in
> cassandra.cluster.ResponseFuture.result (cassandra/cluster.c:73073)
> cassandra.protocol.ServerError: <Error from server: code=0000 [Server error]
> message="com.google.common.util.concurrent.UncheckedExecutionException:
> com.google.common.util.concurrent.UncheckedExecutionException:
> java.lang.NullPointerException">
> ===========================================================
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