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https://issues.apache.org/jira/browse/HBASE-25331?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wellington Chevreuil resolved HBASE-25331.
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Resolution: Fixed
Thanks for reviewing it, [~psomogyi]!
> [HBOSS] TreeLockManager should log warnings about lock contention periodically
> ------------------------------------------------------------------------------
>
> Key: HBASE-25331
> URL: https://issues.apache.org/jira/browse/HBASE-25331
> Project: HBase
> Issue Type: Improvement
> Affects Versions: hbase-filesystem-1.0.0-alpha1
> Reporter: Wellington Chevreuil
> Assignee: Wellington Chevreuil
> Priority: Major
> Fix For: hbase-filesystem-1.0.0-alpha2
>
>
> While performing some internal tests with hboss, [~psomogyi] noticed that
> *TreeLockManager* class logs too frequently when it is waiting on parent
> write lock.
> {noformat}
> 2020-10-26 17:35:41,719 WARN
> org.apache.hadoop.hbase.oss.sync.TreeLockManager: Blocked waiting for some
> parent write lock, waiting:
> /s3a/hbase/hbase-dl/db1/hbase/data/default/test1/.tabledesc/.tableinfo.0000000001
> 2020-10-26 17:35:41,720 WARN
> org.apache.hadoop.hbase.oss.sync.TreeLockManager: Blocked waiting for some
> parent write lock, waiting:
> /s3a/hbase/hbase-dl/db1/hbase/data/default/test1/.tabledesc/.tableinfo.0000000001
> 2020-10-26 17:35:41,721 WARN
> org.apache.hadoop.hbase.oss.sync.TreeLockManager: Blocked waiting for some
> parent write lock, waiting:
> /s3a/hbase/hbase-dl/db1/hbase/data/default/test1/.tabledesc/.tableinfo.0000000001
> 2020-10-26 17:35:41,723 WARN
> org.apache.hadoop.hbase.oss.sync.TreeLockManager: Blocked waiting for some
> parent write lock, waiting:
> /s3a/hbase/hbase-dl/db1/hbase/data/default/test1/.tabledesc/.tableinfo.0000000001
> 2020-10-26 17:35:41,724 WARN
> org.apache.hadoop.hbase.oss.sync.TreeLockManager: Blocked waiting for some
> parent write lock, waiting:
> /s3a/hbase/hbase-dl/db1/hbase/data/default/test1/.tabledesc/.tableinfo.0000000001
> 2020-10-26 17:35:41,725 WARN
> org.apache.hadoop.hbase.oss.sync.TreeLockManager: Blocked waiting for some
> parent write lock, waiting:
> /s3a/hbase/hbase-dl/db1/hbase/data/default/test1/.tabledesc/.tableinfo.0000000001
> 2020-10-26 17:35:41,726 WARN
> org.apache.hadoop.hbase.oss.sync.TreeLockManager: Blocked waiting for some
> parent write lock, waiting:
> /s3a/hbase/hbase-dl/db1/hbase/data/default/test1/.tabledesc/.tableinfo.0000000001
> 2020-10-26 17:35:41,728 WARN
> org.apache.hadoop.hbase.oss.sync.TreeLockManager: Blocked waiting for some
> parent write lock, waiting:
> /s3a/hbase/hbase-dl/db1/hbase/data/default/test1/.tabledesc/.tableinfo.0000000001
> 2020-10-26 17:35:41,729 WARN
> org.apache.hadoop.hbase.oss.sync.TreeLockManager: Blocked waiting for some
> parent write lock, waiting:
> /s3a/hbase/hbase-dl/db1/hbase/data/default/test1/.tabledesc/.tableinfo.0000000001
> 2020-10-26 17:35:41,730 WARN
> org.apache.hadoop.hbase.oss.sync.TreeLockManager: Blocked waiting for some
> parent write lock, waiting:
> /s3a/hbase/hbase-dl/db1/hbase/data/default/test1/.tabledesc/.tableinfo.0000000001
> {noformat}
> In 4 seconds on a single RegionServer this WARN was logged 1767 times.
> This modifies current logging logic, to calculate the time spent trying to
> acquire locks on individual nodes, then warning only given a configurable
> threshold is exhausted.
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