[OOZIE-3542] Handle better old Hdfs implementations in ECPolicyDisabler

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 5.2.0
• Component/s: tools
• Flags: Patch
• Assignee: Zsombor Gegesy
• Reporter: Zsombor Gegesy
• Created: 06/Sep/19 09:56
• Updated: 09/Dec/19 08:54
• Resolved: 16/Oct/19 11:46

Description

Currently, ECPolicyDisabler checks if the local hdfs implementation has the necessary methods to get and set erasure coding policy. However, if the namenode implementation is old, it could throw a org.apache.hadoop.ipc.RemoteException with RpcErrorCodeProto.ERROR_NO_SUCH_METHOD value in it.
In this case, ECPolicyDisabler fails, and prevents the installation to succeed.

This case should be handled just like, when erasure coding is not supported.