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Jinglun commented on HDFS-13811: -------------------------------- Hi [~linyiqun], thanks your comments ! I didn't think about the web UI before, thanks your reminding ! I haven't looked into the code, just a guess: is the web UI usage fetched from the state store now ? Might be we can display the usage from the local cache(RouterQuotaManager) ? I had a look of [~dibyendu_hadoop]'s way but not in detail. I'll try to figure out how it works and how to fix the web UI this weekend. > RBF: Race condition between router admin quota update and periodic quota > update service > --------------------------------------------------------------------------------------- > > Key: HDFS-13811 > URL: https://issues.apache.org/jira/browse/HDFS-13811 > Project: Hadoop HDFS > Issue Type: Sub-task > Reporter: Dibyendu Karmakar > Assignee: Jinglun > Priority: Major > Attachments: HDFS-13811-000.patch, HDFS-13811-HDFS-13891-000.patch, > HDFS-13811.001.patch, HDFS-13811.002.patch, HDFS-13811.003.patch > > > If we try to update quota of an existing mount entry and at the same time > periodic quota update service is running on the same mount entry, it is > leading the mount table to _inconsistent state._ > Here transactions are: > A - Quota update service is fetching mount table entries. > B - Quota update service is updating the mount table with current usage. > A' - User is trying to update quota using admin cmd. > and the transaction sequence is [ A A' B ] > quota update service is updating the mount table with old quota value. -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org