[HDFS-11659] TestDataNodeHotSwapVolumes.testRemoveVolumeBeingWritten fail due to no DataNode available for pipeline recovery.

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.7.3, 3.0.0-alpha2
• Fix Version/s: 2.9.0, 3.0.0-alpha4
• Component/s: datanode
• Target Version/s: 2.9.0, 3.0.0-alpha4
• Assignee: Lei (Eddy) Xu
• Reporter: Lei (Eddy) Xu
• Created: 17/Apr/17 20:30
• Updated: 02/Oct/19 17:13
• Resolved: 30/May/17 18:12

Description

The test fails after the following error messages:

java.io.IOException: Failed to replace a bad datanode on the existing pipeline due to no more good datanodes being available to try. (Nodes: current=[DatanodeInfoWithStorage[127.0.0.1:57377,DS-b4ec61fc-657c-4e2a-9dc3-8d93b7769a2b,DISK], DatanodeInfoWithStorage[127.0.0.1:47448,DS-18bca8d7-048d-4d7f-9594-d2df16096a3d,DISK]], original=[DatanodeInfoWithStorage[127.0.0.1:57377,DS-b4ec61fc-657c-4e2a-9dc3-8d93b7769a2b,DISK], DatanodeInfoWithStorage[127.0.0.1:47448,DS-18bca8d7-048d-4d7f-9594-d2df16096a3d,DISK]]). The current failed datanode replacement policy is DEFAULT, and a client may configure this via 'dfs.client.block.write.replace-datanode-on-failure.policy' in its configuration.
	at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.findNewDatanode(DFSOutputStream.java:1280)
	at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.addDatanode2ExistingPipeline(DFSOutputStream.java:1354)
	at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.setupPipelineForAppendOrRecovery(DFSOutputStream.java:1512)
	at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.processDatanodeError(DFSOutputStream.java:1236)
	at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:721)

In such case, the DataNode that has removed can not be used in the pipeline recovery.