[FLINK-4097] Cassandra Sink throws NPE on closing if server is not available

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.1.0
• Fix Version/s: 1.1.0
• Component/s: Connectors / Common
• Assignee: Andrea Sella
• Reporter: Robert Metzger
• Created: 21/Jun/16 09:50
• Updated: 04/Jul/16 11:16
• Resolved: 22/Jun/16 10:34

Description

11:41:41,515 ERROR org.apache.flink.streaming.connectors.cassandra.CassandraSinkBase  - Error while closing session.
java.lang.NullPointerException
	at org.apache.flink.streaming.connectors.cassandra.CassandraSinkBase.close(CassandraSinkBase.java:84)
	at org.apache.flink.api.common.functions.util.FunctionUtils.closeFunction(FunctionUtils.java:45)
	at org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.dispose(AbstractUdfStreamOperator.java:107)
	at org.apache.flink.streaming.runtime.tasks.StreamTask.disposeAllOperators(StreamTask.java:370)
	at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:304)
	at org.apache.flink.runtime.taskmanager.Task.run(Task.java:588)
	at java.lang.Thread.run(Thread.java:745)

11:41:43,896 ERROR org.apache.flink.runtime.taskmanager.Task                     - Task execution failed. 
com.datastax.driver.core.exceptions.NoHostAvailableException: All host(s) tried for query failed (tried: /127.0.0.1:9042 (com.datastax.driver.core.exceptions.TransportException: [/127.0.0.1] Cannot connect))
	at com.datastax.driver.core.ControlConnection.reconnectInternal(ControlConnection.java:231)
	at com.datastax.driver.core.ControlConnection.connect(ControlConnection.java:77)
	at com.datastax.driver.core.Cluster$Manager.init(Cluster.java:1414)
	at com.datastax.driver.core.Cluster.init(Cluster.java:162)
	at com.datastax.driver.core.Cluster.connectAsync(Cluster.java:333)
	at com.datastax.driver.core.Cluster.connectAsync(Cluster.java:308)
	at com.datastax.driver.core.Cluster.connect(Cluster.java:250)
	at org.apache.flink.streaming.connectors.cassandra.CassandraSinkBase.open(CassandraSinkBase.java:67)
	at org.apache.flink.streaming.connectors.cassandra.CassandraPojoSink.open(CassandraPojoSink.java:48)
	at org.apache.flink.api.common.functions.util.FunctionUtils.openFunction(FunctionUtils.java:38)
	at org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.open(AbstractUdfStreamOperator.java:91)
	at org.apache.flink.streaming.runtime.tasks.StreamTask.openAllOperators(StreamTask.java:340)
	at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:225)
	at org.apache.flink.runtime.taskmanager.Task.run(Task.java:588)
	at java.lang.Thread.run(Thread.java:745)

Issue Links

• links to: GitHub Pull Request #2144