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  1. Debezium
  2. DBZ-4982

NullPointerException while processing binlog event

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    • Resolution: Duplicate
    • Icon: Major Major
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    • 1.9.0.Final
    • core-library
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      Create a mysql connector with `read.only` mode turned on and GTID's enabled. 

      Execute the following GRANT query to any user

      GRANT SELECT ON `db`.`table` TO 'user'

       

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      Create a mysql connector with `read.only` mode turned on and GTID's enabled.  Execute the following GRANT query to any user GRANT SELECT ON `db`.`table` TO 'user'  

      When processing a binlog event while in `read.only` mode with GTID's enabled the  `AbstractIncrementalSnapshotChangeEventSource.processSchemaChange` throws a NullPointerException when the event doesn't contain a `TableId`.

      io.debezium.DebeziumException: Error processing binlog event
	at io.debezium.connector.mysql.MySqlStreamingChangeEventSource.handleEvent(MySqlStreamingChangeEventSource.java:369)
	at io.debezium.connector.mysql.MySqlStreamingChangeEventSource.lambda$execute$25(MySqlStreamingChangeEventSource.java:869)
	at com.github.shyiko.mysql.binlog.BinaryLogClient.notifyEventListeners(BinaryLogClient.java:1125)
	at com.github.shyiko.mysql.binlog.BinaryLogClient.listenForEventPackets(BinaryLogClient.java:973)
	at com.github.shyiko.mysql.binlog.BinaryLogClient.connect(BinaryLogClient.java:599)
	at com.github.shyiko.mysql.binlog.BinaryLogClient$7.run(BinaryLogClient.java:857)
	at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: java.lang.NullPointerException
	at io.debezium.pipeline.source.snapshot.incremental.AbstractIncrementalSnapshotChangeEventSource.processSchemaChange(AbstractIncrementalSnapshotChangeEventSource.java:105)
	at io.debezium.pipeline.EventDispatcher.dispatchSchemaChangeEvent(EventDispatcher.java:312)
	at io.debezium.connector.mysql.MySqlStreamingChangeEventSource.handleQueryEvent(MySqlStreamingChangeEventSource.java:575)
	at io.debezium.connector.mysql.MySqlStreamingChangeEventSource.lambda$execute$14(MySqlStreamingChangeEventSource.java:841)
	at io.debezium.connector.mysql.MySqlStreamingChangeEventSource.handleEvent(MySqlStreamingChangeEventSource.java:349)
	... 6 more

      Implementation ideas (optional)

      I see two possibilities of fixing the issue.
      Add a null check on the `dataCollectionId` parameter on the `processSchemaChange` method inside `AbstractIncrementalSnapshotChangeEventSource`

      or 

      Add GRANT query to the DDL Filter set `internal.database.history.ddl.filter`

            Unassigned Unassigned
            larswerkman Lars Werkman (Inactive)
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              Created:
              Updated:
              Resolved: