HDFS-16540 Data locality is lost when DataNode pod restarts in kubern… #4170
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tomscut
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...hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java
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...hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java
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ndimiduk
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...hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java
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| NameNode.stateChangeLog.info("BLOCK* registerDatanode: " + nodeS | ||
| + " is replaced by " + nodeReg + " with the same storageID " | ||
| + nodeReg.getDatanodeUuid()); | ||
| + nodeReg.getDatanodeUuid() + ", updateHost2DatanodeMap: " + updateHost2DatanodeMap); |
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Is this extra information needed at the INFO level log? I understand that having the value printed is helpful during development, but I don't think it's meaningful to an operator.
Also, if you're here to change a log message, maybe also change it to use the format string version instead of string concatenation?
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Yeah, agree. Let me undo this change.
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I am going to upload the patch which does not log updateHost2DatanodeMap.
...op-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestDatanodeManager.java
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I run the failed test [.TestReplaceDatanodeFailureReplication.testWithOnlyLastDatanodeIsAlive] locally multiple times, it passed. |
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Any more comments? Thanks. |
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I'll merge later today (unless someone else beats me to it). |
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…n kubernetes (#4170)" Revert to add the '.' after HDFS-16540 so commit message format matches precedent This reverts commit bda0881.
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…netes (#4170) This reverts the previous commit 4e47eb6 undone so I could reapply with the '.' after the HDFS-16540 as is done in all other commits.
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…netes (apache#4170) Cherry-pick of 9ed8d60
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…netes (apache#4170) Cherry-pick of 9ed8d60
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Sorry for late response. Just found that this PR involved unrelated changes '.BUILDING.txt.swp' under root path of project. If no other concerns I would like to remove it for a while. |
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…etes (apache#4170) When DN with the same UUID is registered with a different IP, host2DatanodeMap needs to be updated accordingly.
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…n kubernetes (apache#4170)" Revert to add the '.' after HDFS-16540 so commit message format matches precedent This reverts commit bda0881.
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…netes (apache#4170) This reverts the previous commit 4e47eb6 undone so I could reapply with the '.' after the HDFS-16540 as is done in all other commits.
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…etes
Description of PR
When Dn with the same uuid is registered with a different ip, host2DatanodeMap needs to be updated accordingly.
How was this patch tested?
Tested 3.3.2 with the patch on a eks cluster, restarted the pod hosting DataNode and HBase region server. After that, doing a major compaction of Hbase region, made sure that locality is kept.
There is also a new unittest case added.
For code changes:
LICENSE,LICENSE-binary,NOTICE-binaryfiles?