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HDFS-17710. Don't add journal edits to cache until after persisted to storage #7296

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Kimahriman
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Description of PR

Update the process of JournalNodes journaling new edits to persist edits to disk before adding them to the edit cache. This prevents standby and observer nodes from accidentally reading transactions from the edit cache when tailing logs that have not actually been durably persisted, making the standby or observer have in invalid state thinking the latest committed transaction is higher than it should be.

How was this patch tested?

New UT using a new fault injector method to simulate a disk write failure.

For code changes:

  • Does the title or this PR starts with the corresponding JIRA issue id (e.g. 'HADOOP-17799. Your PR title ...')?
  • Object storage: have the integration tests been executed and the endpoint declared according to the connector-specific documentation?
  • If adding new dependencies to the code, are these dependencies licensed in a way that is compatible for inclusion under ASF 2.0?
  • If applicable, have you updated the LICENSE, LICENSE-binary, NOTICE-binary files?

@Kimahriman
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@ZanderXu @aswinmprabhu since you were most recently working with the Journal code.

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💔 -1 overall

Vote Subsystem Runtime Logfile Comment
+0 🆗 reexec 0m 44s Docker mode activated.
_ Prechecks _
+1 💚 dupname 0m 0s No case conflicting files found.
+0 🆗 codespell 0m 1s codespell was not available.
+0 🆗 detsecrets 0m 1s detect-secrets was not available.
+1 💚 @author 0m 0s The patch does not contain any @author tags.
+1 💚 test4tests 0m 0s The patch appears to include 1 new or modified test files.
_ trunk Compile Tests _
+1 💚 mvninstall 34m 48s trunk passed
+1 💚 compile 1m 18s trunk passed with JDK Ubuntu-11.0.25+9-post-Ubuntu-1ubuntu120.04
+1 💚 compile 1m 9s trunk passed with JDK Private Build-1.8.0_432-8u432-gaus1-0ubuntu220.04-ga
+1 💚 checkstyle 1m 10s trunk passed
+1 💚 mvnsite 1m 19s trunk passed
+1 💚 javadoc 1m 10s trunk passed with JDK Ubuntu-11.0.25+9-post-Ubuntu-1ubuntu120.04
+1 💚 javadoc 1m 39s trunk passed with JDK Private Build-1.8.0_432-8u432-gaus1-0ubuntu220.04-ga
+1 💚 spotbugs 3m 9s trunk passed
+1 💚 shadedclient 34m 48s branch has no errors when building and testing our client artifacts.
_ Patch Compile Tests _
+1 💚 mvninstall 1m 3s the patch passed
+1 💚 compile 1m 9s the patch passed with JDK Ubuntu-11.0.25+9-post-Ubuntu-1ubuntu120.04
+1 💚 javac 1m 9s the patch passed
+1 💚 compile 1m 0s the patch passed with JDK Private Build-1.8.0_432-8u432-gaus1-0ubuntu220.04-ga
+1 💚 javac 1m 0s the patch passed
+1 💚 blanks 0m 1s The patch has no blanks issues.
-0 ⚠️ checkstyle 0m 57s /results-checkstyle-hadoop-hdfs-project_hadoop-hdfs.txt hadoop-hdfs-project/hadoop-hdfs: The patch generated 2 new + 5 unchanged - 0 fixed = 7 total (was 5)
+1 💚 mvnsite 1m 8s the patch passed
+1 💚 javadoc 0m 57s the patch passed with JDK Ubuntu-11.0.25+9-post-Ubuntu-1ubuntu120.04
+1 💚 javadoc 1m 32s the patch passed with JDK Private Build-1.8.0_432-8u432-gaus1-0ubuntu220.04-ga
+1 💚 spotbugs 3m 3s the patch passed
+1 💚 shadedclient 34m 33s patch has no errors when building and testing our client artifacts.
_ Other Tests _
-1 ❌ unit 224m 39s /patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt hadoop-hdfs in the patch passed.
+1 💚 asflicense 0m 46s The patch does not generate ASF License warnings.
350m 33s
Reason Tests
Failed junit tests hadoop.hdfs.TestDecommission
Subsystem Report/Notes
Docker ClientAPI=1.47 ServerAPI=1.47 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7296/1/artifact/out/Dockerfile
GITHUB PR #7296
Optional Tests dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname Linux ddef7e2929aa 5.15.0-130-generic #140-Ubuntu SMP Wed Dec 18 17:59:53 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
Build tool maven
Personality dev-support/bin/hadoop.sh
git revision trunk / 4604794
Default Java Private Build-1.8.0_432-8u432-gaus1-0ubuntu220.04-ga
Multi-JDK versions /usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.25+9-post-Ubuntu-1ubuntu120.04 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_432-8u432-gaus1-0ubuntu220.04-ga
Test Results https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7296/1/testReport/
Max. process+thread count 3983 (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-7296/1/console
versions git=2.25.1 maven=3.6.3 spotbugs=4.2.2
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2 participants