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When you import complex data type definitions for a Streaming mapping, the
Import Complex Data Type Definitionsdialog box does not display XML in the file format list.
When you create a write data object operation for a MapR Streams data object and try to view the advanced properties tab, a null pointer exception occurs.
Workaround: Select the advanced properties tab of the data object write operation in the Mapping editor.
Streaming mappings that read from MapR Streams sometimes fail with the following error:
Failed to get records
When you run applications on a MapR cluster, failover does not happen and the following error occurs:
ERROR StreamsListener fs/client/marlin/cc/listener/listenerimpl.cc:699 Thread: 26778 Seek called on unsubscribed partitions
When you run two concurrent Streaming mappings that read from the same Kafka broker, where one mapping contains a Union transformation and one mapping contains a Joiner transformation, the mappings do not run and a warning appears in the logs as follows:
WARN ConsumerCoordinator: Auto offset commit failed for group IIS-Kafka-DStream-Consumer-1499852337694: Commit cannot be completed since the group has already rebalanced and assigned the partitions to another member.
Workaround: Run the mappings one after the other.
When you project columns in XML format, the Streaming mapping fails if the XSD schema contains definitions for namespace and references.
When you read XML payloads in Streaming mappings, the default values specified in the XSD schema are not read by the StaxXMLParser and StaxXMLGenerator.
When you read XML payloads in Streaming mappings, the nillable constraint specified in the XSD schema is not read by the StaxXMLParser and StaxXMLGenerator.
You cannot specify attributes for simple elements in XML payloads in Streaming mappings.