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https://issues.apache.org/jira/browse/DERBY-4304?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12736641#action_12736641
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Mamta A. Satoor commented on DERBY-4304:
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With revision, committed 798742, made changes so that during server shutdown 
sub-steps, we print the exception info and then move on to the next step in 
server shutdown.The commit comments were as follows
*****************
During server shutdown substeps, catch any exception thrown, print it to 
console along with stack trace and then move on to the next substep rather than 
re-throwing the exception after console printing.
*****************

> Network Server shutdown should handle exceptions and finish the server 
> shutdown completely
> ------------------------------------------------------------------------------------------
>
>                 Key: DERBY-4304
>                 URL: https://issues.apache.org/jira/browse/DERBY-4304
>             Project: Derby
>          Issue Type: Improvement
>          Components: Network Server
>    Affects Versions: 10.6.0.0
>            Reporter: Mamta A. Satoor
>            Assignee: Mamta A. Satoor
>         Attachments: DERBY4304_fixNPE_patch2_diff.txt, 
> DERBY4304_handleExceptions_patch1_diff.txt
>
>
> While working on DERBY-4053, found that an exception from Connection.close 
> was not handled properly by the server shutdown code which caused a new 
> instance server startup to hang. Resolved the problem with Connection close 
> but in general, we should
> 1) Make sure an exception during shutdown processing does not prevent the 
> remaining shutdown tasks, like closing the server socket from occurring. 
> 2) Make sure any exceptions that occur in shutdown processing are reported to 
> the console. 

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