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https://issues.apache.org/jira/browse/HDFS-16535?focusedWorklogId=757377&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-757377
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ASF GitHub Bot logged work on HDFS-16535:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 15/Apr/22 11:05
Start Date: 15/Apr/22 11:05
Worklog Time Spent: 10m
Work Description: stiga-huang commented on code in PR #4158:
URL: https://github.com/apache/hadoop/pull/4158#discussion_r851214126
##########
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/shortcircuit/ShortCircuitCache.java:
##########
@@ -240,7 +245,7 @@ public void run() {
} else {
shm.getEndpointShmManager().shutdown(shm);
IOUtilsClient.cleanupWithLogger(LOG, domainSocket, out);
- domainSocket = null;
Review Comment:
> why do you remove the line 243?
`domainSocket` is now a local variable (defined at line 192). We don't need
to update it at the end of this method. Note that this `finally` clause belongs
to the try-clause starts at line 195.
> If remove it, the line 228 looks redundant.
For line 228, it's needed in the next retry of the while-loop. The check at
line 199 will catch it and trigger a re-connect.
Issue Time Tracking
-------------------
Worklog Id: (was: 757377)
Time Spent: 1h 20m (was: 1h 10m)
> SlotReleaser should reuse the domain socket based on socket paths
> -----------------------------------------------------------------
>
> Key: HDFS-16535
> URL: https://issues.apache.org/jira/browse/HDFS-16535
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: hdfs-client
> Affects Versions: 3.3.1, 3.4.0
> Reporter: Quanlong Huang
> Priority: Major
> Labels: pull-request-available
> Time Spent: 1h 20m
> Remaining Estimate: 0h
>
> HDFS-13639 improves the performance of short-circuit shm slot releasing by
> reusing the domain socket that the client previously used to send release
> request to the DataNode.
> This is good when there are only one DataNode locates with the client (truth
> in most of the production environment). However, if we launch multiple
> DataNodes on a machine (usually for testing, e.g. Impala's end-to-end tests),
> the request could be sent to the wrong DataNode. See an example in
> IMPALA-11234.
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