[HDFS-5970] callers of NetworkTopology's chooseRandom method to expect null return value

• Type: Bug
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 3.0.0-alpha1
• Component/s: namenode
• Assignee: Unassigned
• Reporter: Yongjun Zhang
• Created: 19/Feb/14 00:46
• Updated: 17/Aug/18 17:35

Description

Class NetworkTopology's method
public Node chooseRandom(String scope)
calls
private Node chooseRandom(String scope, String excludedScope)

which may return null value.

Callers of this method such as BlockPlacementPolicyDefault etc need to be aware that.

Issue Links

• is duplicated by: HDFS-5972 callers of NetworkTopology's chooseRandom method to expect null return value
• is duplicated by: HDFS-5971 callers of NetworkTopology's chooseRandom method to expect null return value
• is duplicated by: HDFS-5965 caller of NetworkTopology's chooseRandom method to be expect null return value
• is duplicated by: HDFS-5967 caller of NetworkTopology's chooseRandom method to be expect null return value
• is duplicated by: HDFS-5969 caller of NetworkTopology's chooseRandom method to be expect null return value