[CASSANDRA-12700] During writing data into Cassandra 3.7.0 using Python driver 3.7 sometimes Connection get lost, because of Server NullPointerException

• Type: Bug
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 2.2.9, 3.0.10, 3.10
• Component/s: Legacy/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

• Severity: Normal
• Since Version: 3.7
• Assignee: Jeff Jirsa
• Reporter: Rajesh Radhakrishnan

Authors

Jeff Jirsa

Reviewers

Sam Tunnicliffe

• Created: 23/Sep/16 13:09
• Updated: 16/Apr/19 09:30
• Resolved: 12/Oct/16 04:31

Description

In our C* cluster we are using the latest Cassandra 3.7.0 (datastax-ddc.3.70) with Python driver 3.7. Trying to insert 2 million row or more data into the database, but sometimes we are getting "Null pointer Exception".

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">

cassandra config

 Node configuration:[allocate_tokens_for_keyspace=null; authenticator=PasswordAuthenticator; authorizer=CassandraAuthorizer; auto_bootstrap=true; auto_snapshot=true; batch_size_fail_threshold_in_kb=100; batch_size_warn_threshold_in_kb=10; batchlog_replay_throttle_in_kb=1024; broadcast_address=null; broadcast_rpc_address=null; buffer_pool_use_heap_if_exhausted=true; cas_contention_timeout_in_ms=5000; client_encryption_options=<REDACTED>; cluster_name=VCF Stress Cluster; column_index_cache_size_in_kb=2; column_index_size_in_kb=64; commit_failure_policy=stop; commitlog_compression=null; commitlog_directory=null; commitlog_max_compression_buffers_in_pool=3; commitlog_periodic_queue_size=-1; commitlog_segment_size_in_mb=32; commitlog_sync=periodic; commitlog_sync_batch_window_in_ms=null; commitlog_sync_period_in_ms=10000; commitlog_total_space_in_mb=null; compaction_large_partition_warning_threshold_mb=150; compaction_throughput_mb_per_sec=20; concurrent_compactors=null; concurrent_counter_writes=32; concurrent_materialized_view_writes=32; concurrent_reads=32; concurrent_replicates=null; concurrent_writes=32; counter_cache_keys_to_save=2147483647; counter_cache_save_period=7200; counter_cache_size_in_mb=null; counter_write_request_timeout_in_ms=5000; credentials_cache_max_entries=1000; credentials_update_interval_in_ms=-1; credentials_validity_in_ms=2000; cross_node_timeout=false; data_file_directories=[Ljava.lang.String;@36fc695d; disk_access_mode=auto; disk_failure_policy=stop; disk_optimization_estimate_percentile=0.95; disk_optimization_page_cross_chance=0.1; disk_optimization_strategy=spinning; dynamic_snitch=true; dynamic_snitch_badness_threshold=0.1; dynamic_snitch_reset_interval_in_ms=600000; dynamic_snitch_update_interval_in_ms=100; enable_scripted_user_defined_functions=false; enable_user_defined_functions=false; enable_user_defined_functions_threads=true; encryption_options=null; endpoint_snitch=SimpleSnitch; file_cache_size_in_mb=null; gc_warn_threshold_in_ms=1000; hinted_handoff_disabled_datacenters=[]; hinted_handoff_enabled=true; hinted_handoff_throttle_in_kb=1024; hints_compression=null; hints_directory=null; hints_flush_period_in_ms=10000; incremental_backups=false; index_interval=null; index_summary_capacity_in_mb=null; index_summary_resize_interval_in_minutes=60; initial_token=null; inter_dc_stream_throughput_outbound_megabits_per_sec=200; inter_dc_tcp_nodelay=false; internode_authenticator=null; internode_compression=dc; internode_recv_buff_size_in_bytes=null; internode_send_buff_size_in_bytes=null; key_cache_keys_to_save=2147483647; key_cache_save_period=14400; key_cache_size_in_mb=null; listen_address=IP.251; listen_interface=null; listen_interface_prefer_ipv6=false; listen_on_broadcast_address=false; max_hint_window_in_ms=10800000; max_hints_delivery_threads=2; max_hints_file_size_in_mb=128; max_mutation_size_in_kb=null; max_streaming_retries=3; max_value_size_in_mb=256; memtable_allocation_type=offheap_objects; memtable_cleanup_threshold=null; memtable_flush_writers=1; memtable_heap_space_in_mb=null; memtable_offheap_space_in_mb=null; native_transport_max_concurrent_connections=-1; native_transport_max_concurrent_connections_per_ip=-1; native_transport_max_frame_size_in_mb=256; native_transport_max_threads=128; native_transport_port=9042; native_transport_port_ssl=null; num_tokens=256; otc_coalescing_strategy=TIMEHORIZON; otc_coalescing_window_us=200; partitioner=org.apache.cassandra.dht.Murmur3Partitioner; permissions_cache_max_entries=1000; permissions_update_interval_in_ms=-1; permissions_validity_in_ms=2000; phi_convict_threshold=8.0; prepared_statements_cache_size_mb=null; range_request_timeout_in_ms=11000; read_request_timeout_in_ms=6000; request_scheduler=org.apache.cassandra.scheduler.NoScheduler; request_scheduler_id=null; request_scheduler_options=null; request_timeout_in_ms=20000; role_manager=CassandraRoleManager; roles_cache_max_entries=1000; roles_update_interval_in_ms=-1; roles_validity_in_ms=2000; row_cache_class_name=org.apache.cassandra.cache.OHCProvider; row_cache_keys_to_save=2147483647; row_cache_save_period=0; row_cache_size_in_mb=0; rpc_address=IP.251; rpc_interface=null; rpc_interface_prefer_ipv6=false; rpc_keepalive=true; rpc_listen_backlog=50; rpc_max_threads=2147483647; rpc_min_threads=16; rpc_port=9160; rpc_recv_buff_size_in_bytes=null; rpc_send_buff_size_in_bytes=null; rpc_server_type=sync; saved_caches_directory=null; seed_provider=org.apache.cassandra.locator.SimpleSeedProvider{seeds=IP.251}; server_encryption_options=<REDACTED>; snapshot_before_compaction=false; ssl_storage_port=7001; sstable_preemptive_open_interval_in_mb=50; start_native_transport=true; start_rpc=false; storage_port=7000; stream_throughput_outbound_megabits_per_sec=250; streaming_socket_timeout_in_ms=86400000; thrift_framed_transport_size_in_mb=15; thrift_max_message_length_in_mb=16; thrift_prepared_statements_cache_size_mb=null; tombstone_failure_threshold=100000; tombstone_warn_threshold=1000; tracetype_query_ttl=86400; tracetype_repair_ttl=604800; transparent_data_encryption_options=org.apache.cassandra.config.TransparentDataEncryptionOptions@28701274; trickle_fsync=false; trickle_fsync_interval_in_kb=10240; truncate_request_timeout_in_ms=60000; unlogged_batch_across_partitions_warn_threshold=10; user_defined_function_fail_timeout=1500; user_defined_function_warn_timeout=500; user_function_timeout_policy=die; windows_timer_interval=1; write_request_timeout_in_ms=10000]