[jira] [Commented] (HDFS-16876) Garbage collect map entries in shared RouterStateIdContext using information from namenodeResolver instead of the map of active connectionPools.
[ https://issues.apache.org/jira/browse/HDFS-16876?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17656338#comment-17656338 ] ASF GitHub Bot commented on HDFS-16876: --- omalley merged PR #5282: URL: https://github.com/apache/hadoop/pull/5282 > Garbage collect map entries in shared RouterStateIdContext using information > from namenodeResolver instead of the map of active connectionPools. > > > Key: HDFS-16876 > URL: https://issues.apache.org/jira/browse/HDFS-16876 > Project: Hadoop HDFS > Issue Type: Bug > Components: rbf >Reporter: Simbarashe Dzinamarira >Assignee: Simbarashe Dzinamarira >Priority: Critical > Labels: pull-request-available > > An element in RouterStateIdContext#namespaceIdMap is deleted when there is no > connectionPool referencing the namespace. This is done by a thread in > ConnectionManager that cleans up stale connectionPools. I propose a less > aggressive approach, that is, cleaning up an entry when the router cannot > resolve a namenode belonging to the namespace. > Some benefits of this approach are: > * Even when there are no active connections, the router still tracks a > recent state of the namenode. This will be beneficial for debugging. > * Simpler lifecycle for the map entries. The entries are long-lived. > * Few operations under the writeLock in ConnectionManager. -- This message was sent by Atlassian Jira (v8.20.10#820010) - To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org
[jira] [Commented] (HDFS-16876) Garbage collect map entries in shared RouterStateIdContext using information from namenodeResolver instead of the map of active connectionPools.
[
https://issues.apache.org/jira/browse/HDFS-16876?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17655672#comment-17655672
]
ASF GitHub Bot commented on HDFS-16876:
---
hadoop-yetus commented on PR #5282:
URL: https://github.com/apache/hadoop/pull/5282#issuecomment-1374427144
:confetti_ball: **+1 overall**
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> Garbage collect map entries in shared RouterStateIdContext using information
>
[jira] [Commented] (HDFS-16876) Garbage collect map entries in shared RouterStateIdContext using information from namenodeResolver instead of the map of active connectionPools.
[
https://issues.apache.org/jira/browse/HDFS-16876?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17655656#comment-17655656
]
ASF GitHub Bot commented on HDFS-16876:
---
hadoop-yetus commented on PR #5282:
URL: https://github.com/apache/hadoop/pull/5282#issuecomment-1374389996
:broken_heart: **-1 overall**
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[jira] [Commented] (HDFS-16876) Garbage collect map entries in shared RouterStateIdContext using information from namenodeResolver instead of the map of active connectionPools.
[
https://issues.apache.org/jira/browse/HDFS-16876?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17655635#comment-17655635
]
ASF GitHub Bot commented on HDFS-16876:
---
hadoop-yetus commented on PR #5282:
URL: https://github.com/apache/hadoop/pull/5282#issuecomment-1374364662
:confetti_ball: **+1 overall**
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| Console output |
[jira] [Commented] (HDFS-16876) Garbage collect map entries in shared RouterStateIdContext using information from namenodeResolver instead of the map of active connectionPools.
[ https://issues.apache.org/jira/browse/HDFS-16876?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17655614#comment-17655614 ] ASF GitHub Bot commented on HDFS-16876: --- simbadzina opened a new pull request, #5282: URL: https://github.com/apache/hadoop/pull/5282 HDFS-16876: Changes cleanup of shared RouterStateIdContext to be driven by namenodeResolver data. ### Description of PR Changes cleanup of shared RouterStateIdContext to be driven by namenodeResolver data, versus tracking the set of active connection pools. ### How was this patch tested? New test cases in TestObserverWithRouter. **testSharedStateInRouterStateIdContext** validates that entries in the RouterStateIdContext are long lived and not recreated when connectionPools are deleted. This fails with the previous approach, and passes with the new one. **testRouterStateIdContextCleanup** validates that the new approach eventually deletes entries in the map. ### For code changes: - [ X] Does the title or this PR starts with the corresponding JIRA issue id (e.g. 'HADOOP-17799. Your PR title ...')? > Garbage collect map entries in shared RouterStateIdContext using information > from namenodeResolver instead of the map of active connectionPools. > > > Key: HDFS-16876 > URL: https://issues.apache.org/jira/browse/HDFS-16876 > Project: Hadoop HDFS > Issue Type: Bug > Components: rbf >Reporter: Simbarashe Dzinamarira >Assignee: Simbarashe Dzinamarira >Priority: Critical > > When cleaning up stale connection pools, the ConnectionManager also removes > the associated namespace to stateId mapping from the shared > RouterStateIdContext. A mapping is only removed when there is no other > connectionPool referencing it. When a new connection is created, the stateId > mapping gets recreated. > Since the RouterStateIdContext is shared across connections, it is cleaner to > drive its cleanup using the list of namespaces the router references instead > of closely tracking the active connections. -- This message was sent by Atlassian Jira (v8.20.10#820010) - To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org
