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From "Tellier Benoit (JIRA)" <server-...@james.apache.org>
Subject [jira] [Commented] (JAMES-2555) Re-indexing big mailboxes fails
Date Mon, 03 Dec 2018 03:31:00 GMT

    [ https://issues.apache.org/jira/browse/JAMES-2555?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16706629#comment-16706629
] 

Tellier Benoit commented on JAMES-2555:
---------------------------------------

@mbaechler is not happy with the webadmin ReIndexing API cf https://github.com/linagora/james-project/pull/1948#discussion_r236977988


Proposal that emerged from PR comments:


{code:java}
#ReIndex all mailboxes
POST /mailboxes?task=reIndex

# A single mailbox
POST /mailboxes/id?task=reIndex

# A single message in a mailbox
POST /mailboxes/id/messages/mId?task=reIndex

# A single message
POST /messages/id/?task=reIndex

# A single user
POST /mailboxes?task=reIndex&user=bob@domain.tld
{code}




> Re-indexing big mailboxes fails
> -------------------------------
>
>                 Key: JAMES-2555
>                 URL: https://issues.apache.org/jira/browse/JAMES-2555
>             Project: James Server
>          Issue Type: Bug
>          Components: CLI, mailbox
>    Affects Versions: 3.0.0, master, 3.0.1, 3.1.0
>            Reporter: Tellier Benoit
>            Priority: Major
>              Labels: perf
>             Fix For: 3.2.0
>
>
> Reported internally:
> {code:java}
> Doing a reindex via the CLI on a mailbox which contains ~24000 mails does not work.
>  -  heap out of memory issue
> Heap increased, then:
>  -  cassandra timeout when increasing heap
> Timeout increased, then:
>  -  heap out of memory issue
> Heap increased, then:
>  -  GC overhead limit exceeded
> {code}
> In ReIndexerImpl instead of doing a FULL read to reindex the all mailbox (AND all of
the related data) we should rather do a first metadata query to load uids then perform subsequent
single reads.
> That is the root issue: trying to load 11 Go of mails in memory.
> Furthermore, a simple error should not trigger the end of a ReIndexing.



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