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.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] ================================================================================================================== Thank you. Kind regards, Rajesh Radhakrishnan ************************************************************************** The information contained in the EMail and any attachments is confidential and intended solely and for the attention and use of the named addressee(s). It may not be disclosed to any other person without the express authority of Public Health England, or the intended recipient, or both. If you are not the intended recipient, you must not disclose, copy, distribute or retain this message or any part of it. This footnote also confirms that this EMail has been swept for computer viruses by Symantec.Cloud, but please re-sweep any attachments before opening or saving. http://www.gov.uk/PHE **************************************************************************