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List:       james-dev
Subject:    [jira] [Created] (JAMES-3886) LocalDelivery failure when mailbox counter update
From:       "Benoit Tellier (Jira)" <server-dev () james ! apache ! org>
Date:       2023-02-17 3:31:00
Message-ID: JIRA.13525125.1676604653000.79789.1676604660005 () Atlassian ! JIRA
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Benoit Tellier created JAMES-3886:
-------------------------------------

             Summary: LocalDelivery failure when mailbox counter update
                 Key: JAMES-3886
                 URL: https://issues.apache.org/jira/browse/JAMES-3886
             Project: James Server
          Issue Type: New Feature
          Components: cassandra, mailbox
    Affects Versions: 3.7.3
            Reporter: Benoit Tellier
             Fix For: 3.7.4, 3.8.0


As part of a customer support contract, we noticed that a failure to update mailbox \
counters results in a delivery failures.

Log line:

{code:java}
2023-02-10T10:10:57,537 [WARN ] o.a.j.t.m.d.MailDispatcher - Error While storing \
                mail. This error will be retried.
com.datastax.driver.core.exceptions.WriteTimeoutException: Cassandra timeout during \
COUNTER write query at consistency ONE (1 replica were required but only 0 \
acknowledged the write) {code}

Consistency level ONE usage is inherent to counter usage. Thus errors are to be \
expected in case of single Cassandra node failure.

I hereby proposes to IGNORE failure to update counters and just fire a WARNING log to \
inform the administrator.

Rationnals:
 - The mail is already stored in a mailbox
 - counters can be seen as not business critical but a mere indicator
 - And we have the tools (applicative read repairs + corrective tasks) to fix the \
inconsistencies CF https://github.com/apache/james-project/blob/master/src/adr/0023-cassandra-mailbox-counters-inconsistencies.md \
https://github.com/apache/james-project/blob/master/src/adr/0042-applicative-read-repairs.md




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