[
https://issues.apache.org/jira/browse/ACCUMULO-4751?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16277154#comment-16277154
]
Adam J Shook commented on ACCUMULO-4751:
----------------------------------------
My initial finding is that some entries coming out of the {{StatusUtil}} don't
have a {{createdTime}}. Whereas something like [1] writes a metadata entry to
a WAL and the replication status is updated with a {{createdTime}}. I am
guessing that, in this case, there is no ingest for a particular table during
the lifetime of the WAL, so the work to replicate the WAL to a particular table
(via the key extent) is never created. However, something else is writing some
information that doesn't have a {{createdTime}}.
I'll do some more digging to see if this can be nailed down.
[1]
https://github.com/apache/accumulo/blob/rel/1.8.1/server/tserver/src/main/java/org/apache/accumulo/tserver/log/TabletServerLogger.java#L390
> Some WALs don't replicate due to lacking a createdTime entry
> ------------------------------------------------------------
>
> Key: ACCUMULO-4751
> URL: https://issues.apache.org/jira/browse/ACCUMULO-4751
> Project: Accumulo
> Issue Type: Bug
> Affects Versions: 1.7.3, 1.8.1
> Reporter: Adam J Shook
> Assignee: Adam J Shook
>
> From what I can tell, the below error is thrown when no data for a particular
> table is written to a WAL, but the file is closed. This would be because the
> {{Status}} entry from the {{StatusUtil}} for {{fileClosed}} is pre-built and
> therefore does not have a {{createdTime}}. This prevents a WAL from being
> replicated until a {{createdTime}} entry is added manually.
> From the Accumulo master:
> {code}
> Status record ([begin: 0 end: 0 infiniteEnd: true closed: true]) for
> hdfs://namenode:9000/accumulo/wal/tserver.example.com+31732/f922df9c-3ffc-49ee-8d0c-261c7a05fea2
> in table 7l was written to metadata table which lacked createdTime
> {code}
> There are two solutions I have in mind:
> 1. Update the {{StatusUtil}} such that every returned {{Status}} object sets
> the {{createdTime}} to {{System.currentTimeMillis}} if not explicitly given.
> 2. Update the Accumulo Master to set the {{createdTime}} to the WAL's
> modification time in HDFS if the WAL is closed but there is no
> {{createdTime}}.
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
