[HDDS-1751] replication of underReplicated container fails with SCMContainerPlacementRackAware policy

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.4.0
• Component/s: SCM
• Labels: MiniOzoneChaosCluster
• Target Version/s: 0.5.0
• Assignee: Sammi Chen Assign to me
• Reporter: Mukul Kumar Singh
• Created: 02/Jul/19 13:05
• Updated: 23/Jul/19 09:12
• Resolved: 23/Jul/19 09:12

Description

SCM container replication fails with

2019-07-02 18:26:41,564 WARN  container.ReplicationManager (ReplicationManager.java:handleUnderReplicatedContainer(501)) - Exception while replicating container 18.
org.apache.hadoop.hdds.scm.exceptions.SCMException: No enough datanodes to choose.
        at org.apache.hadoop.hdds.scm.container.placement.algorithms.SCMContainerPlacementRackAware.chooseDatanodes(SCMContainerPlacementRackAware.java:100)
        at org.apache.hadoop.hdds.scm.container.ReplicationManager.handleUnderReplicatedContainer(ReplicationManager.java:487)
        at org.apache.hadoop.hdds.scm.container.ReplicationManager.processContainer(ReplicationManager.java:293)
        at java.util.concurrent.ConcurrentHashMap$KeySetView.forEach(ConcurrentHashMap.java:4649)
        at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1080)
        at org.apache.hadoop.hdds.scm.container.ReplicationManager.run(ReplicationManager.java:205)
        at java.lang.Thread.run(Thread.java:748)