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Posted to derby-dev@db.apache.org by "Rick Hillegas (JIRA)" <ji...@apache.org> on 2011/08/11 20:24:27 UTC

[jira] [Created] (DERBY-5381) Replication should replicate jar file operations from the master to the slave.

Replication should replicate jar file operations from the master to the slave.
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                 Key: DERBY-5381
                 URL: https://issues.apache.org/jira/browse/DERBY-5381
             Project: Derby
          Issue Type: Improvement
          Components: Replication
    Affects Versions: 10.9.0.0
            Reporter: Rick Hillegas


Derby does not replicate calls to the sqlj jar procedures (install_jar, replace_jar, remove_jar). This limitation is described in the Server Guide in the section titled "Starting and running replication". If jar files are added or updated on the master database, then user-defined functions, procedures, and UDTs may break after failover to the slave. This can be a serious problem for applications which exploit both replication and user-defined schema objects. For such applications, automatic failover is difficult if not impossible.

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[jira] [Commented] (DERBY-5381) Replication should replicate jar file operations from the master to the slave.

Posted by "Rick Hillegas (JIRA)" <ji...@apache.org>.
    [ https://issues.apache.org/jira/browse/DERBY-5381?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13083346#comment-13083346 ] 

Rick Hillegas commented on DERBY-5381:
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Possible solutions include:

1) Build replication of the sqlj operations. This might involve streaming jar file contents into the log for master databases.

2) Disallow the sqlj operations on master databases.

> Replication should replicate jar file operations from the master to the slave.
> ------------------------------------------------------------------------------
>
>                 Key: DERBY-5381
>                 URL: https://issues.apache.org/jira/browse/DERBY-5381
>             Project: Derby
>          Issue Type: Improvement
>          Components: Replication
>    Affects Versions: 10.9.0.0
>            Reporter: Rick Hillegas
>
> Derby does not replicate calls to the sqlj jar procedures (install_jar, replace_jar, remove_jar). This limitation is described in the Server Guide in the section titled "Starting and running replication". If jar files are added or updated on the master database, then user-defined functions, procedures, and UDTs may break after failover to the slave. This can be a serious problem for applications which exploit both replication and user-defined schema objects. For such applications, automatic failover is difficult if not impossible.

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