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https://issues.apache.org/jira/browse/HDFS-16498?focusedWorklogId=748178&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-748178
]
ASF GitHub Bot logged work on HDFS-16498:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 26/Mar/22 09:56
Start Date: 26/Mar/22 09:56
Worklog Time Spent: 10m
Work Description: tomscut commented on a change in pull request #4057:
URL: https://github.com/apache/hadoop/pull/4057#discussion_r835745725
##########
File path:
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManager.java
##########
@@ -2751,6 +2751,13 @@ public boolean checkBlockReportLease(BlockReportContext
context,
return true;
}
DatanodeDescriptor node = datanodeManager.getDatanode(nodeID);
+ if (node == null) {
+ final UnregisteredNodeException e = new
UnregisteredNodeException(nodeID, null);
+ NameNode.stateChangeLog.error("BLOCK* NameSystem.getDatanode: " + "Data
node " + nodeID +
Review comment:
> @tomscut you can remove this exception from here, considering it is
being logged in the upper method.
>
> > Although it is DEBU level now, we could improve that to WARN, right?
>
> I think debug is also fine, this doesn't denote any problematic stuff,
this can happen in normal scenario as well and the datanode will register
subsequently
Hi @ayushtkn, do you mean I just remove this log?
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Issue Time Tracking
-------------------
Worklog Id: (was: 748178)
Time Spent: 4h (was: 3h 50m)
> Fix NPE for checkBlockReportLease
> ---------------------------------
>
> Key: HDFS-16498
> URL: https://issues.apache.org/jira/browse/HDFS-16498
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: tomscut
> Assignee: tomscut
> Priority: Major
> Labels: pull-request-available
> Attachments: image-2022-03-09-20-35-22-028.png, screenshot-1.png
>
> Time Spent: 4h
> Remaining Estimate: 0h
>
> During the restart of Namenode, a Datanode is not registered, but this
> Datanode triggers FBR, which causes NPE.
> !image-2022-03-09-20-35-22-028.png|width=871,height=158!
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