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Posted to hcatalog-commits@incubator.apache.org by "Ashutosh Chauhan (JIRA)" <ji...@apache.org> on 2011/06/03 18:41:47 UTC

[jira] [Created] (HCATALOG-39) Lazily create connection for Message bus

Lazily create connection for Message bus
----------------------------------------

                 Key: HCATALOG-39
                 URL: https://issues.apache.org/jira/browse/HCATALOG-39
             Project: HCatalog
          Issue Type: Improvement
    Affects Versions: 0.2
            Reporter: Ashutosh Chauhan
             Fix For: 0.2


Currently a connection to a jms provider is created in constructor. This results in two problems: 1) This implies message bus must be up before metastore starts up. 2) If connection cannot be made, no further attempts to reconnect will be made until metastore restarts.

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[jira] [Resolved] (HCATALOG-39) Lazily create connection for Message bus

Posted by "Ashutosh Chauhan (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/HCATALOG-39?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ashutosh Chauhan resolved HCATALOG-39.
--------------------------------------

    Resolution: Fixed

Patch checked in.

> Lazily create connection for Message bus
> ----------------------------------------
>
>                 Key: HCATALOG-39
>                 URL: https://issues.apache.org/jira/browse/HCATALOG-39
>             Project: HCatalog
>          Issue Type: Improvement
>    Affects Versions: 0.2
>            Reporter: Ashutosh Chauhan
>            Assignee: Ashutosh Chauhan
>             Fix For: 0.2
>
>         Attachments: hcat_39-1.patch, hcat_39.patch
>
>
> Currently a connection to a jms provider is created in constructor. This results in two problems: 1) This implies message bus must be up before metastore starts up. 2) If connection cannot be made, no further attempts to reconnect will be made until metastore restarts.

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[jira] [Commented] (HCATALOG-39) Lazily create connection for Message bus

Posted by "Ashutosh Chauhan (JIRA)" <ji...@apache.org>.
    [ https://issues.apache.org/jira/browse/HCATALOG-39?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13043957#comment-13043957 ] 

Ashutosh Chauhan commented on HCATALOG-39:
------------------------------------------

Better strategy is to create a connection when message needs to be delivered and then cache it. On subsequent message delivery request, check if there is a valid connection, if not try creating again.

> Lazily create connection for Message bus
> ----------------------------------------
>
>                 Key: HCATALOG-39
>                 URL: https://issues.apache.org/jira/browse/HCATALOG-39
>             Project: HCatalog
>          Issue Type: Improvement
>    Affects Versions: 0.2
>            Reporter: Ashutosh Chauhan
>             Fix For: 0.2
>
>
> Currently a connection to a jms provider is created in constructor. This results in two problems: 1) This implies message bus must be up before metastore starts up. 2) If connection cannot be made, no further attempts to reconnect will be made until metastore restarts.

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[jira] [Assigned] (HCATALOG-39) Lazily create connection for Message bus

Posted by "Ashutosh Chauhan (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/HCATALOG-39?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ashutosh Chauhan reassigned HCATALOG-39:
----------------------------------------

    Assignee: Ashutosh Chauhan

> Lazily create connection for Message bus
> ----------------------------------------
>
>                 Key: HCATALOG-39
>                 URL: https://issues.apache.org/jira/browse/HCATALOG-39
>             Project: HCatalog
>          Issue Type: Improvement
>    Affects Versions: 0.2
>            Reporter: Ashutosh Chauhan
>            Assignee: Ashutosh Chauhan
>             Fix For: 0.2
>
>         Attachments: hcat_39.patch
>
>
> Currently a connection to a jms provider is created in constructor. This results in two problems: 1) This implies message bus must be up before metastore starts up. 2) If connection cannot be made, no further attempts to reconnect will be made until metastore restarts.

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[jira] [Commented] (HCATALOG-39) Lazily create connection for Message bus

Posted by "Mac Yang (JIRA)" <ji...@apache.org>.
    [ https://issues.apache.org/jira/browse/HCATALOG-39?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13049327#comment-13049327 ] 

Mac Yang commented on HCATALOG-39:
----------------------------------

+1

> Lazily create connection for Message bus
> ----------------------------------------
>
>                 Key: HCATALOG-39
>                 URL: https://issues.apache.org/jira/browse/HCATALOG-39
>             Project: HCatalog
>          Issue Type: Improvement
>    Affects Versions: 0.2
>            Reporter: Ashutosh Chauhan
>            Assignee: Ashutosh Chauhan
>             Fix For: 0.2
>
>         Attachments: hcat_39-1.patch, hcat_39.patch
>
>
> Currently a connection to a jms provider is created in constructor. This results in two problems: 1) This implies message bus must be up before metastore starts up. 2) If connection cannot be made, no further attempts to reconnect will be made until metastore restarts.

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[jira] [Updated] (HCATALOG-39) Lazily create connection for Message bus

Posted by "Ashutosh Chauhan (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/HCATALOG-39?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ashutosh Chauhan updated HCATALOG-39:
-------------------------------------

    Attachment: hcat_39.patch

Attached patch makes hcat server robust against message bus. If message bus goes down, message wont be delivered, when it comes back up again, message delivery should restart.

> Lazily create connection for Message bus
> ----------------------------------------
>
>                 Key: HCATALOG-39
>                 URL: https://issues.apache.org/jira/browse/HCATALOG-39
>             Project: HCatalog
>          Issue Type: Improvement
>    Affects Versions: 0.2
>            Reporter: Ashutosh Chauhan
>             Fix For: 0.2
>
>         Attachments: hcat_39.patch
>
>
> Currently a connection to a jms provider is created in constructor. This results in two problems: 1) This implies message bus must be up before metastore starts up. 2) If connection cannot be made, no further attempts to reconnect will be made until metastore restarts.

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[jira] [Updated] (HCATALOG-39) Lazily create connection for Message bus

Posted by "Ashutosh Chauhan (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/HCATALOG-39?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ashutosh Chauhan updated HCATALOG-39:
-------------------------------------

    Attachment: hcat_39-1.patch

Wow, patch got stale within 30 mins ! Patch rebased. 

> Lazily create connection for Message bus
> ----------------------------------------
>
>                 Key: HCATALOG-39
>                 URL: https://issues.apache.org/jira/browse/HCATALOG-39
>             Project: HCatalog
>          Issue Type: Improvement
>    Affects Versions: 0.2
>            Reporter: Ashutosh Chauhan
>            Assignee: Ashutosh Chauhan
>             Fix For: 0.2
>
>         Attachments: hcat_39-1.patch, hcat_39.patch
>
>
> Currently a connection to a jms provider is created in constructor. This results in two problems: 1) This implies message bus must be up before metastore starts up. 2) If connection cannot be made, no further attempts to reconnect will be made until metastore restarts.

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