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https://issues.apache.org/jira/browse/HDFS-17205?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17768769#comment-17768769
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ASF GitHub Bot commented on HDFS-17205:
---------------------------------------
hadoop-yetus commented on PR #6112:
URL: https://github.com/apache/hadoop/pull/6112#issuecomment-1734090460
:broken_heart: **-1 overall**
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|:----:|----------:|--------:|:--------:|:-------:|
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| +1 :green_heart: | @author | 0m 0s | | The patch does not contain
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| +1 :green_heart: | test4tests | 0m 1s | | The patch appears to
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|||| _ trunk Compile Tests _ |
| +1 :green_heart: | mvninstall | 32m 29s | | trunk passed |
| +1 :green_heart: | compile | 0m 56s | | trunk passed with JDK
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| +1 :green_heart: | javadoc | 0m 52s | | trunk passed with JDK
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|||| _ Patch Compile Tests _ |
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| +1 :green_heart: | compile | 0m 48s | | the patch passed with JDK
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issues. |
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[/results-checkstyle-hadoop-hdfs-project_hadoop-hdfs.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6112/1/artifact/out/results-checkstyle-hadoop-hdfs-project_hadoop-hdfs.txt)
| hadoop-hdfs-project/hadoop-hdfs: The patch generated 1 new + 460 unchanged
- 0 fixed = 461 total (was 460) |
| +1 :green_heart: | mvnsite | 0m 47s | | the patch passed |
| +1 :green_heart: | javadoc | 0m 39s | | the patch passed with JDK
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| +1 :green_heart: | spotbugs | 1m 55s | | the patch passed |
| +1 :green_heart: | shadedclient | 22m 5s | | patch has no errors
when building and testing our client artifacts. |
|||| _ Other Tests _ |
| -1 :x: | unit | 197m 2s |
[/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6112/1/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt)
| hadoop-hdfs in the patch passed. |
| +1 :green_heart: | asflicense | 0m 39s | | The patch does not
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| | | 291m 34s | | |
| Reason | Tests |
|-------:|:------|
| Failed junit tests | hadoop.hdfs.server.datanode.TestDirectoryScanner |
| Subsystem | Report/Notes |
|----------:|:-------------|
| Docker | ClientAPI=1.43 ServerAPI=1.43 base:
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6112/1/artifact/out/Dockerfile
|
| GITHUB PR | https://github.com/apache/hadoop/pull/6112 |
| Optional Tests | dupname asflicense compile javac javadoc mvninstall
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| Test Results |
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6112/1/testReport/ |
| Max. process+thread count | 3481 (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-6112/1/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.
> HdfsServerConstants.MIN_BLOCKS_FOR_WRITE should be configurable
> ---------------------------------------------------------------
>
> Key: HDFS-17205
> URL: https://issues.apache.org/jira/browse/HDFS-17205
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Haiyang Hu
> Assignee: Haiyang Hu
> Priority: Major
> Labels: pull-request-available
>
> Current allocate new block , the NameNode will choose datanode and choose a
> good storage of given storage type from datanode, the specific calling code
> is DatanodeDescriptor#chooseStorage4Block, here will calculate the space
> required for write operations,
> requiredSize = blockSize * HdfsServerConstants.MIN_BLOCKS_FOR_WRITE(default
> is 1).
> {code:java}
> public DatanodeStorageInfo chooseStorage4Block(StorageType t,
> long blockSize) {
> final long requiredSize =
> blockSize * HdfsServerConstants.MIN_BLOCKS_FOR_WRITE;
> final long scheduledSize = blockSize * getBlocksScheduled(t);
> long remaining = 0;
> DatanodeStorageInfo storage = null;
> for (DatanodeStorageInfo s : getStorageInfos()) {
> if (s.getState() == State.NORMAL && s.getStorageType() == t) {
> if (storage == null) {
> storage = s;
> }
> long r = s.getRemaining();
> if (r >= requiredSize) {
> remaining += r;
> }
> }
> }
> if (requiredSize > remaining - scheduledSize) {
> BlockPlacementPolicy.LOG.debug(
> "The node {} does not have enough {} space (required={},"
> + " scheduled={}, remaining={}).",
> this, t, requiredSize, scheduledSize, remaining);
> return null;
> }
> return storage;
> }
> {code}
> But when multiple NameSpaces select the storage of the same datanode to write
> blocks at the same time.
> In extreme cases, if there is only one block size left in the current
> storage, there will be a situation where there is not enough free space for
> the writer to write data.
> log similar to the following appears:
> {code:java}
> The volume [file:/disk1/] with the available space (=21129618 B) is less than
> the block size (=268435456 B).
> {code}
> In order to avoid this case, consider
> HdfsServerConstants.MIN_BLOCKS_FOR_WRITE should be configurable, and the
> parameters can be adjusted in larger clusters.
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