Naresh P R created HIVE-26495:
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Summary: MSCK repair perf issue HMSChecker ThreadPool is blocked
at fs.listStatus
Key: HIVE-26495
URL: https://issues.apache.org/jira/browse/HIVE-26495
Project: Hive
Issue Type: New Feature
Reporter: Naresh P R
Assignee: Naresh P R
With hive.metastore.fshandler.threads = 15, all 15 *MSCK-GetPaths-xx* are
slogging at following trace.
{code:java}
"MSCK-GetPaths-11" #12345 daemon prio=5 os_prio=0 tid= nid= waiting on
condition [0x00007f9f099a6000]
java.lang.Thread.State: WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x00000003f92d1668> (a
java.util.concurrent.CompletableFuture$Signaller)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
at
java.util.concurrent.CompletableFuture$Signaller.block(CompletableFuture.java:1707)
at java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3323)
...
at org.apache.hadoop.fs.s3a.S3AFileSystem.listStatus(S3AFileSystem.java:3230)
at org.apache.hadoop.fs.FileSystem.listStatus(FileSystem.java:1953)
at org.apache.hadoop.fs.FileSystem.listStatus(FileSystem.java:1995)
at
org.apache.hadoop.hive.metastore.HiveMetaStoreChecker$PathDepthInfoCallable.processPathDepthInfo(HiveMetaStoreChecker.java:550)
at
org.apache.hadoop.hive.metastore.HiveMetaStoreChecker$PathDepthInfoCallable.call(HiveMetaStoreChecker.java:543)
at
org.apache.hadoop.hive.metastore.HiveMetaStoreChecker$PathDepthInfoCallable.call(HiveMetaStoreChecker.java:525)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:750){code}
We should take advantage of non-block listStatusIterator instead of listStatus
which is a blocking call.
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