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https://issues.apache.org/jira/browse/HDFS-16659?focusedWorklogId=790595&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-790595
 ]

ASF GitHub Bot logged work on HDFS-16659:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 13/Jul/22 20:48
            Start Date: 13/Jul/22 20:48
    Worklog Time Spent: 10m 
      Work Description: hadoop-yetus commented on PR #4560:
URL: https://github.com/apache/hadoop/pull/4560#issuecomment-1183663577

   :confetti_ball: **+1 overall**
   
   
   
   
   
   
   | Vote | Subsystem | Runtime |  Logfile | Comment |
   |:----:|----------:|--------:|:--------:|:-------:|
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|
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   | +1 :green_heart: |  test4tests  |   0m  0s |  |  The patch appears to 
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   |||| _ trunk Compile Tests _ |
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Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1  |
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   |||| _ Patch Compile Tests _ |
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when building and testing our client artifacts.  |
   |||| _ Other Tests _ |
   | +1 :green_heart: |  unit  | 241m 50s |  |  hadoop-hdfs in the patch 
passed.  |
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   |  |   | 350m 48s |  |  |
   
   
   | Subsystem | Report/Notes |
   |----------:|:-------------|
   | Docker | ClientAPI=1.41 ServerAPI=1.41 base: 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4560/1/artifact/out/Dockerfile
 |
   | GITHUB PR | https://github.com/apache/hadoop/pull/4560 |
   | Optional Tests | dupname asflicense compile javac javadoc mvninstall 
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   | uname | Linux d1165fe0bbf9 4.15.0-112-generic #113-Ubuntu SMP Thu Jul 9 
23:41:39 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux |
   | Build tool | maven |
   | Personality | dev-support/bin/hadoop.sh |
   | git revision | trunk / d637d4bf1a303dcacf34ea4f276aac337ce416d7 |
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/usr/lib/jvm/java-8-openjdk-amd64:Private 
Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07 |
   |  Test Results | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4560/1/testReport/ |
   | Max. process+thread count | 3347 (vs. ulimit of 5500) |
   | modules | C: hadoop-hdfs-project/hadoop-hdfs U: 
hadoop-hdfs-project/hadoop-hdfs |
   | Console output | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4560/1/console |
   | 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.
   
   




Issue Time Tracking
-------------------

    Worklog Id:     (was: 790595)
    Time Spent: 20m  (was: 10m)

> JournalNode should throw CacheMissException if SinceTxId is bigger than 
> HighestWrittenTxId
> ------------------------------------------------------------------------------------------
>
>                 Key: HDFS-16659
>                 URL: https://issues.apache.org/jira/browse/HDFS-16659
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: ZanderXu
>            Assignee: ZanderXu
>            Priority: Critical
>              Labels: pull-request-available
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> JournalNode should throw `CacheMissException` if `sinceTxId` is bigger than 
> `highestWrittenTxId`. And it will caused EditlogTailer can not able to tail 
> edits. And it maybe caused ObserverNameNode can not able handle requests from 
> clients.
> Suppose there are 3 journalNodes, JN0 ~ JN1.
> The corner case as blew:
> * JN0 has some abnormal cases when Active Namenode is journaling Edits with 
> start txId 11
> * NameNode just ignore the abnormal JN0 and continue to write Edits to 
> Journal 1 and 2
> * JN0 backed to health
> * Observer NameNode try to select EditLogInputStream vis PRC with start txId 
> 21
> * Journal 1 has some abnormal cases caused slow rpc response
> And the expected selecting result is: Response should contain 20 Edits from 
> txId 21 to txId 40 from JN1 and JN2. Because Active NameNode successfully 
> write these Edits to JN1 and JN2 and failed write these edits to JN0, so 
> there is no Edits from id 21 to 40 in the cache of JN0.
> But in the current implementation,  there is no Edits in the Response. 
> Because namenode successfully got a response from JN0 that did not contains 
> any Edits.
> And the bug code as blew:
> {code:java}
> if (sinceTxId > getHighestWrittenTxId()) {
>     // Requested edits that don't exist yet; short-circuit the cache here
>     metrics.rpcEmptyResponses.incr();
>     return 
> GetJournaledEditsResponseProto.newBuilder().setTxnCount(0).build(); 
> }
> {code}



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