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Posted to common-issues@hadoop.apache.org by GitBox <gi...@apache.org> on 2022/11/02 10:38:54 UTC

[GitHub] [hadoop] zhengchenyu opened a new pull request, #5099: HDFS-16832. [SBN READ] Fix NPE when check the block location of empty…

zhengchenyu opened a new pull request, #5099:
URL: https://github.com/apache/hadoop/pull/5099

   ### Description of PR
   
   https://issues.apache.org/jira/browse/HDFS-16832
   
   ### How was this patch tested?
   
   1. unit test
   2. check in our cluster manually
   
   ### For code changes:
   
   check null point
   
   


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[GitHub] [hadoop] zhengchenyu commented on pull request #5099: HDFS-16832. [SBN READ] Fix NPE when check the block location of empty…

Posted by GitBox <gi...@apache.org>.
zhengchenyu commented on PR #5099:
URL: https://github.com/apache/hadoop/pull/5099#issuecomment-1309832743

   @xkrogen @shvachko @ZanderXu Can you please review this PR? NPE is introduced by HDFS-16732. NPE will reproduce by below: 
   ```
   hive -hiveconf "hive.execution.engine=tez" -e "select 1 as a1 UNION ALL select 2 as a2";
   ```


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[GitHub] [hadoop] hadoop-yetus commented on pull request #5099: HDFS-16832. [SBN READ] Fix NPE when check the block location of empty…

Posted by GitBox <gi...@apache.org>.
hadoop-yetus commented on PR #5099:
URL: https://github.com/apache/hadoop/pull/5099#issuecomment-1320865634

   :broken_heart: **-1 overall**
   
   
   
   
   
   
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[GitHub] [hadoop] xkrogen commented on pull request #5099: HDFS-16832. [SBN READ] Fix NPE when check the block location of empty…

Posted by GitBox <gi...@apache.org>.
xkrogen commented on PR #5099:
URL: https://github.com/apache/hadoop/pull/5099#issuecomment-1322317231

   `TestLeaseRecovery2` has been flaky; I am not worried about the failure.
   
   Merging to trunk. Thank you for the contribution @zhengchenyu !


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[GitHub] [hadoop] zhengchenyu closed pull request #5099: HDFS-16832. [SBN READ] Fix NPE when check the block location of empty…

Posted by GitBox <gi...@apache.org>.
zhengchenyu closed pull request #5099: HDFS-16832. [SBN READ] Fix NPE when check the block location of empty…
URL: https://github.com/apache/hadoop/pull/5099


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[GitHub] [hadoop] zhengchenyu commented on a diff in pull request #5099: HDFS-16832. [SBN READ] Fix NPE when check the block location of empty…

Posted by GitBox <gi...@apache.org>.
zhengchenyu commented on code in PR #5099:
URL: https://github.com/apache/hadoop/pull/5099#discussion_r1027023627


##########
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java:
##########
@@ -9034,9 +9038,12 @@ private boolean isObserver() {
 
   private void checkBlockLocationsWhenObserver(LocatedBlocks blocks, String src)
       throws ObserverRetryOnActiveException {
-    for (LocatedBlock b : blocks.getLocatedBlocks()) {
-      if (b.getLocations() == null || b.getLocations().length == 0) {
-        throw new ObserverRetryOnActiveException("Zero blocklocations for " + src);
+    List<LocatedBlock> locatedBlockList = blocks.getLocatedBlocks();

Review Comment:
   OK, I have fix it.



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[GitHub] [hadoop] zhengchenyu commented on pull request #5099: HDFS-16832. [SBN READ] Fix NPE when check the block location of empty…

Posted by GitBox <gi...@apache.org>.
zhengchenyu commented on PR #5099:
URL: https://github.com/apache/hadoop/pull/5099#issuecomment-1319476223

   > @zhengchenyu Thanks for your update. I will merge it tomorrow if there are no other comments.
   
   Okay, Thanks for your review again!


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[GitHub] [hadoop] xkrogen commented on a diff in pull request #5099: HDFS-16832. [SBN READ] Fix NPE when check the block location of empty…

Posted by GitBox <gi...@apache.org>.
xkrogen commented on code in PR #5099:
URL: https://github.com/apache/hadoop/pull/5099#discussion_r1026650818


##########
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java:
##########
@@ -9034,9 +9038,12 @@ private boolean isObserver() {
 
   private void checkBlockLocationsWhenObserver(LocatedBlocks blocks, String src)
       throws ObserverRetryOnActiveException {
-    for (LocatedBlock b : blocks.getLocatedBlocks()) {
-      if (b.getLocations() == null || b.getLocations().length == 0) {
-        throw new ObserverRetryOnActiveException("Zero blocklocations for " + src);
+    List<LocatedBlock> locatedBlockList = blocks.getLocatedBlocks();

Review Comment:
   minor nit (non-blocking): can we move the null-check for `blocks` inside of this method? Then we only need it one place instead of duplicated three times



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[GitHub] [hadoop] ZanderXu commented on pull request #5099: HDFS-16832. [SBN READ] Fix NPE when check the block location of empty…

Posted by GitBox <gi...@apache.org>.
ZanderXu commented on PR #5099:
URL: https://github.com/apache/hadoop/pull/5099#issuecomment-1319471891

   @zhengchenyu Thanks for your update. I will merge it tomorrow if there are no other comments.


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[GitHub] [hadoop] hadoop-yetus commented on pull request #5099: HDFS-16832. [SBN READ] Fix NPE when check the block location of empty…

Posted by GitBox <gi...@apache.org>.
hadoop-yetus commented on PR #5099:
URL: https://github.com/apache/hadoop/pull/5099#issuecomment-1301076583

   :confetti_ball: **+1 overall**
   
   
   
   
   
   
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   | Powered by | Apache Yetus 0.14.0 https://yetus.apache.org |
   
   
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[GitHub] [hadoop] hadoop-yetus commented on pull request #5099: HDFS-16832. [SBN READ] Fix NPE when check the block location of empty…

Posted by GitBox <gi...@apache.org>.
hadoop-yetus commented on PR #5099:
URL: https://github.com/apache/hadoop/pull/5099#issuecomment-1319087087

   :confetti_ball: **+1 overall**
   
   
   
   
   
   
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[GitHub] [hadoop] xkrogen merged pull request #5099: HDFS-16832. [SBN READ] Fix NPE when check the block location of empty…

Posted by GitBox <gi...@apache.org>.
xkrogen merged PR #5099:
URL: https://github.com/apache/hadoop/pull/5099


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[GitHub] [hadoop] zhengchenyu commented on pull request #5099: HDFS-16832. [SBN READ] Fix NPE when check the block location of empty…

Posted by GitBox <gi...@apache.org>.
zhengchenyu commented on PR #5099:
URL: https://github.com/apache/hadoop/pull/5099#issuecomment-1300016713

   @xkrogen @shvachko Can you please review this PR?


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[GitHub] [hadoop] ZanderXu commented on pull request #5099: HDFS-16832. [SBN READ] Fix NPE when check the block location of empty…

Posted by GitBox <gi...@apache.org>.
ZanderXu commented on PR #5099:
URL: https://github.com/apache/hadoop/pull/5099#issuecomment-1318360160

   @zhengchenyu Can you rebase trunk and trigger the yetus?


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[GitHub] [hadoop] hadoop-yetus commented on pull request #5099: HDFS-16832. [SBN READ] Fix NPE when check the block location of empty…

Posted by GitBox <gi...@apache.org>.
hadoop-yetus commented on PR #5099:
URL: https://github.com/apache/hadoop/pull/5099#issuecomment-1319086287

   :broken_heart: **-1 overall**
   
   
   
   
   
   
   | Vote | Subsystem | Runtime |  Logfile | Comment |
   |:----:|----------:|--------:|:--------:|:-------:|
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   | +1 :green_heart: |  javadoc  |   1m 24s |  |  trunk passed with JDK Ubuntu-11.0.16+8-post-Ubuntu-0ubuntu120.04  |
   | +1 :green_heart: |  javadoc  |   1m 44s |  |  trunk passed with JDK Private Build-1.8.0_342-8u342-b07-0ubuntu1~20.04-b07  |
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   |||| _ Patch Compile Tests _ |
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   |||| _ Other Tests _ |
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   |  |   | 550m 52s |  |  |
   
   
   | Reason | Tests |
   |-------:|:------|
   | Failed junit tests | hadoop.hdfs.server.diskbalancer.command.TestDiskBalancerCommand |
   
   
   | Subsystem | Report/Notes |
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   | versions | git=2.25.1 maven=3.6.3 spotbugs=4.2.2 |
   | Powered by | Apache Yetus 0.14.0 https://yetus.apache.org |
   
   
   This message was automatically generated.
   
   


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