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https://issues.apache.org/jira/browse/HDFS-17590?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18072927#comment-18072927
]
ASF GitHub Bot commented on HDFS-17590:
---------------------------------------
hadoop-yetus commented on PR #8328:
URL: https://github.com/apache/hadoop/pull/8328#issuecomment-4231051210
:broken_heart: **-1 overall**
| Vote | Subsystem | Runtime | Logfile | Comment |
|:----:|----------:|--------:|:--------:|:-------:|
| +0 :ok: | reexec | 0m 21s | | Docker mode activated. |
|||| _ Prechecks _ |
| +1 :green_heart: | dupname | 0m 0s | | No case conflicting files
found. |
| +0 :ok: | codespell | 0m 0s | | codespell was not available. |
| +0 :ok: | detsecrets | 0m 0s | | detect-secrets was not available.
|
| +1 :green_heart: | @author | 0m 0s | | The patch does not contain
any @author tags. |
| +1 :green_heart: | test4tests | 0m 0s | | The patch appears to
include 6 new or modified test files. |
|||| _ trunk Compile Tests _ |
| +0 :ok: | mvndep | 1m 40s | | Maven dependency ordering for branch |
| +1 :green_heart: | mvninstall | 25m 16s | | trunk passed |
| +1 :green_heart: | compile | 2m 57s | | trunk passed with JDK
Ubuntu-21.0.10+7-Ubuntu-124.04 |
| +1 :green_heart: | compile | 3m 12s | | trunk passed with JDK
Ubuntu-17.0.18+8-Ubuntu-124.04.1 |
| +1 :green_heart: | checkstyle | 1m 14s | | trunk passed |
| +1 :green_heart: | mvnsite | 2m 1s | | trunk passed |
| +1 :green_heart: | javadoc | 1m 37s | | trunk passed with JDK
Ubuntu-21.0.10+7-Ubuntu-124.04 |
| +1 :green_heart: | javadoc | 1m 41s | | trunk passed with JDK
Ubuntu-17.0.18+8-Ubuntu-124.04.1 |
| +1 :green_heart: | spotbugs | 4m 22s | | trunk passed |
| +1 :green_heart: | shadedclient | 17m 0s | | branch has no errors
when building and testing our client artifacts. |
|||| _ Patch Compile Tests _ |
| +0 :ok: | mvndep | 0m 17s | | Maven dependency ordering for patch |
| +1 :green_heart: | mvninstall | 1m 14s | | the patch passed |
| +1 :green_heart: | compile | 2m 38s | | the patch passed with JDK
Ubuntu-21.0.10+7-Ubuntu-124.04 |
| +1 :green_heart: | javac | 2m 38s | | the patch passed |
| +1 :green_heart: | compile | 2m 52s | | the patch passed with JDK
Ubuntu-17.0.18+8-Ubuntu-124.04.1 |
| +1 :green_heart: | javac | 2m 52s | | the patch passed |
| +1 :green_heart: | blanks | 0m 0s | | The patch has no blanks
issues. |
| -0 :warning: | checkstyle | 1m 0s |
[/results-checkstyle-hadoop-hdfs-project.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8328/5/artifact/out/results-checkstyle-hadoop-hdfs-project.txt)
| hadoop-hdfs-project: The patch generated 2 new + 153 unchanged - 0 fixed =
155 total (was 153) |
| +1 :green_heart: | mvnsite | 1m 22s | | the patch passed |
| +1 :green_heart: | javadoc | 1m 2s | | the patch passed with JDK
Ubuntu-21.0.10+7-Ubuntu-124.04 |
| +1 :green_heart: | javadoc | 1m 0s | | the patch passed with JDK
Ubuntu-17.0.18+8-Ubuntu-124.04.1 |
| +1 :green_heart: | spotbugs | 4m 0s | | the patch passed |
| +1 :green_heart: | shadedclient | 16m 56s | | patch has no errors
when building and testing our client artifacts. |
|||| _ Other Tests _ |
| +1 :green_heart: | unit | 1m 57s | | hadoop-hdfs-client in the patch
passed. |
| -1 :x: | unit | 181m 15s |
[/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8328/5/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt)
| hadoop-hdfs in the patch passed. |
| +1 :green_heart: | asflicense | 0m 31s | | The patch does not
generate ASF License warnings. |
| | | 277m 15s | | |
| Reason | Tests |
|-------:|:------|
| Failed junit tests | hadoop.hdfs.TestEncryptionZones |
| | hadoop.hdfs.TestEncryptionZonesWithKMS |
| Subsystem | Report/Notes |
|----------:|:-------------|
| Docker | ClientAPI=1.54 ServerAPI=1.54 base:
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8328/5/artifact/out/Dockerfile
|
| GITHUB PR | https://github.com/apache/hadoop/pull/8328 |
| Optional Tests | dupname asflicense compile javac javadoc mvninstall
mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets |
| uname | Linux db304ac88e32 5.15.0-173-generic #183-Ubuntu SMP Fri Mar 6
13:29:34 UTC 2026 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | dev-support/bin/hadoop.sh |
| git revision | trunk / 5fc1d531fd5f094fdc1b64a5eb4708ee2df5b052 |
| Default Java | Ubuntu-17.0.18+8-Ubuntu-124.04.1 |
| Multi-JDK versions |
/usr/lib/jvm/java-21-openjdk-amd64:Ubuntu-21.0.10+7-Ubuntu-124.04
/usr/lib/jvm/java-17-openjdk-amd64:Ubuntu-17.0.18+8-Ubuntu-124.04.1 |
| Test Results |
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8328/5/testReport/ |
| Max. process+thread count | 3652 (vs. ulimit of 10000) |
| modules | C: hadoop-hdfs-project/hadoop-hdfs-client
hadoop-hdfs-project/hadoop-hdfs U: hadoop-hdfs-project |
| Console output |
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8328/5/console |
| versions | git=2.43.0 maven=3.9.11 spotbugs=4.9.7 |
| Powered by | Apache Yetus 0.14.1 https://yetus.apache.org |
This message was automatically generated.
> `NullPointerException` triggered in `createBlockReader` during retry iteration
> ------------------------------------------------------------------------------
>
> Key: HDFS-17590
> URL: https://issues.apache.org/jira/browse/HDFS-17590
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 3.4.0
> Reporter: Bogdan Stoica
> Priority: Critical
> Labels: pull-request-available
>
> While reading blocks of data using `DFSInputStream` in `createBlockReader`, a
> `IOException` originating from `getBlockAt()` that triggers a retry iteration
> results in a `NullPointerException` when passing `dnInfo` to
> `addToLocalDeadNodes` in the catch block.
> This is the relevant callstack portion from our logs (from 3.4.0, but we
> still experience this with versions going into 3.4.1 as recently as late
> June):
> {noformat}
> ...
> java.lang.NullPointerException
> at
> java.base/java.util.concurrent.ConcurrentHashMap.putVal(ConcurrentHashMap.java:1011)
>
> at java.base/
> java.util.concurrent.ConcurrentHashMap.put(ConcurrentHashMap.java:1006)
> at
> org.apache.hadoop.hdfs.DFSInputStream.addToLocalDeadNodes(DFSInputStream.java:184)
>
> at
> org.apache.hadoop.hdfs.DFSStripedInputStream.createBlockReader(DFSStripedInputStream.java:279)
>
> at org.apache.hadoop.hdfs.StripeReader.readChunk(StripeReader.java:304)
> at org.apache.hadoop.hdfs.StripeReader.readStripe(StripeReader.java:335)
> at
> org.apache.hadoop.hdfs.DFSStripedInputStream.fetchBlockByteRange(DFSStripedInputStream.java:504)
>
> at org.apache.hadoop.hdfs.DFSInputStream.pread(DFSInputStream.java:1472)
> at org.apache.hadoop.hdfs.DFSInputStream.read(DFSInputStream.java:1436)
> at org.apache.hadoop.fs.FSInputStream.readFully(FSInputStream.java:124)
> at
> org.apache.hadoop.fs.FSDataInputStream.readFully(FSDataInputStream.java:119)
> ...{noformat}
> What we observe is that `getBlockAt()` thorws an `IOException`
> [here|https://github.com/apache/hadoop/blob/trunk/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DFSInputStream.java#L478]
> {code:java}
> //check offset
> if (offset < 0 || offset >= getFileLength()) {
> throw new IOException("offset < 0 || offset >= getFileLength(), offset="
> + offset
> + ", locatedBlocks=" + locatedBlocks);
> }
> {code}
> This is eventually caught in `createBlockReader`. The catch block attempts to
> handle the error and, as part of the error handling, invokes the
> `addToLocalDeadNodes` method. The `dnInfo` object passed to this method is
> actually `NULL` as it wasn't fully allocated
> ([here)|https://github.com/apache/hadoop/blob/4525c7e35ea22d7a6350b8af10eb8d2ff68376e7/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DFSStripedInputStream.java#L247],
> which results in a `NullPointerException`.
> To sum up, this is the failure path according to the logs:
> # `IOException` is thrown in `getBlockAt`
> ([code|https://github.com/apache/hadoop/blob/trunk/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DFSInputStream.java#L479])
> # The exception propagates to `getBlockGroupAt`
> ([code|https://github.com/apache/hadoop/blob/4525c7e35ea22d7a6350b8af10eb8d2ff68376e7/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DFSStripedInputStream.java#L476])
> # It further propagates to `refreshLocatedBlock`
> ([code)|https://github.com/apache/hadoop/blob/4525c7e35ea22d7a6350b8af10eb8d2ff68376e7/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DFSStripedInputStream.java#L459]
> # `IOException` caught in `createBlockReader`
> ([code|https://github.com/apache/hadoop/blob/4525c7e35ea22d7a6350b8af10eb8d2ff68376e7/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DFSStripedInputStream.java#L247])
> # Error handling in the catch block of `createBlockReader` invokes
> `addToLocalDeadNodes`
> ([code|https://github.com/apache/hadoop/blob/4525c7e35ea22d7a6350b8af10eb8d2ff68376e7/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DFSStripedInputStream.java#L281])
> # Execution throws `NullPointerException` since `dnInfo` is NULL
> A simple fix as a `NULL` check before calling `addToLocalDeadNodes`, and
> similarly adjusting the log messages in the `catch` block where `dnInfo` is
> dereferenced, should solve the issue.
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