HDFS-15889. Erasure Coding: Limit the number of concurrent EC Reconstruct blocks in NameNode

[haiyang1987]

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[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 50s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 1s		codespell 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	35m 26s		trunk passed
+1 💚	compile	1m 25s		trunk passed with JDK Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04
+1 💚	compile	1m 13s		trunk passed with JDK Private Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08
+1 💚	checkstyle	1m 4s		trunk passed
+1 💚	mvnsite	1m 21s		trunk passed
+1 💚	javadoc	0m 53s		trunk passed with JDK Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04
+1 💚	javadoc	1m 19s		trunk passed with JDK Private Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08
+1 💚	spotbugs	3m 18s		trunk passed
+1 💚	shadedclient	18m 51s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	1m 13s		the patch passed
+1 💚	compile	1m 16s		the patch passed with JDK Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04
+1 💚	javac	1m 16s		the patch passed
+1 💚	compile	1m 7s		the patch passed with JDK Private Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08
+1 💚	javac	1m 7s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
-0 ⚠️	checkstyle	0m 58s	/results-checkstyle-hadoop-hdfs-project_hadoop-hdfs.txt	hadoop-hdfs-project/hadoop-hdfs: The patch generated 19 new + 577 unchanged - 0 fixed = 596 total (was 577)
+1 💚	mvnsite	1m 15s		the patch passed
+1 💚	javadoc	0m 46s		the patch passed with JDK Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04
+1 💚	javadoc	1m 19s		the patch passed with JDK Private Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08
+1 💚	spotbugs	3m 18s		the patch passed
+1 💚	shadedclient	19m 0s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
-1 ❌	unit	339m 25s	/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt	hadoop-hdfs in the patch passed.
+1 💚	asflicense	0m 38s		The patch does not generate ASF License warnings.
		433m 23s

Reason	Tests
Failed junit tests	hadoop.hdfs.server.namenode.snapshot.TestNestedSnapshots
	hadoop.hdfs.TestPersistBlocks
	hadoop.hdfs.server.datanode.TestDataNodeVolumeFailure
	hadoop.hdfs.server.namenode.TestDecommissioningStatusWithBackoffMonitor
	hadoop.tools.TestHdfsConfigFields
	hadoop.hdfs.TestDFSShell
	hadoop.hdfs.server.balancer.TestBalancer
	hadoop.hdfs.server.datanode.TestDirectoryScanner
	hadoop.hdfs.server.datanode.TestBlockScanner
	hadoop.hdfs.server.datanode.fsdataset.impl.TestFsVolumeList
	hadoop.hdfs.server.namenode.ha.TestEditLogTailer
	hadoop.hdfs.TestHDFSFileSystemContract
	hadoop.hdfs.server.namenode.ha.TestBootstrapStandby
	hadoop.hdfs.server.namenode.ha.TestPipelinesFailover
	hadoop.hdfs.server.namenode.TestAddOverReplicatedStripedBlocks

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2771/1/artifact/out/Dockerfile
GITHUB PR	#2771
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell
uname	Linux bc3e9d36a4c5 4.15.0-136-generic #140-Ubuntu SMP Thu Jan 28 05:20:47 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / 03b4022
Default Java	Private Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08
Multi-JDK versions	/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2771/1/testReport/
Max. process+thread count	1841 (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-2771/1/console
versions	git=2.25.1 maven=3.6.3 spotbugs=4.2.2
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[github-actions]

We're closing this stale PR because it has been open for 100 days with no activity. This isn't a judgement on the merit of the PR in any way. It's just a way of keeping the PR queue manageable.
If you feel like this was a mistake, or you would like to continue working on it, please feel free to re-open it and ask for a committer to remove the stale tag and review again.
Thanks all for your contribution.