[ASTERIXDB-2005] ArithmeticException on dataset rebalance to a node group with no nodes

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Component/s: CLUS - Cluster management
• Assignee: Murtadha Makki Al Hubail
• Reporter: Murtadha Makki Al Hubail
• Created: 28/Jul/17 15:45
• Updated: 29/Jul/17 09:28
• Resolved: 29/Jul/17 09:28

Description

When a dataset rebalance is done over a node group with no nodes, the following exception is encountered:

java.lang.ArithmeticException: / by zero
	at org.apache.asterix.metadata.declared.MetadataProvider.getCardinalityPerPartitionHint(MetadataProvider.java:719) ~[asterix-metadata-0.9.2-SNAPSHOT.jar:0.9.2-SNAPSHOT]
	at org.apache.asterix.metadata.utils.SecondaryIndexOperationsHelper.init(SecondaryIndexOperationsHelper.java:198) ~[asterix-metadata-0.9.2-SNAPSHOT.jar:0.9.2-SNAPSHOT]
	at org.apache.asterix.metadata.utils.SecondaryIndexOperationsHelper.createIndexOperationsHelper(SecondaryIndexOperationsHelper.java:163) ~[asterix-metadata-0.9.2-SNAPSHOT.jar:0.9.2-SNAPSHOT]
	at org.apache.asterix.metadata.utils.IndexUtil.buildDropIndexJobSpec(IndexUtil.java:112) ~[asterix-metadata-0.9.2-SNAPSHOT.jar:0.9.2-SNAPSHOT]
	at org.apache.asterix.utils.RebalanceUtil.dropDatasetFiles(RebalanceUtil.java:330) ~[asterix-app-0.9.2-SNAPSHOT.jar:0.9.2-SNAPSHOT]
	at org.apache.asterix.utils.RebalanceUtil.rebalance(RebalanceUtil.java:200) ~[asterix-app-0.9.2-SNAPSHOT.jar:0.9.2-SNAPSHOT]
	at org.apache.asterix.utils.RebalanceUtil.rebalance(RebalanceUtil.java:124) ~[asterix-app-0.9.2-SNAPSHOT.jar:0.9.2-SNAPSHOT]

The proposed solution is to treat rebalance to no nodes as a drop dataset.