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https://issues.apache.org/jira/browse/JAMES-2386?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tellier Benoit resolved JAMES-2386.
-----------------------------------
Resolution: Fixed
https://github.com/apache/james-project/pull/113 solved the issue.
Many thanks to Simon Levesque for the changes!
> Data Source Pool is not validating connections
> ----------------------------------------------
>
> Key: JAMES-2386
> URL: https://issues.apache.org/jira/browse/JAMES-2386
> Project: James Server
> Issue Type: Improvement
> Components: JDBC, jpa
> Affects Versions: master
> Reporter: Simon Levesque
> Priority: Minor
> Fix For: master
>
>
> I was seeing a couple exceptions in different calls: * Getting the list of
> emails via imap
> * Reading the emails via imap
> * Sending emails
> * Resolving the rewrite table
> * even in my personal mailet
>
> The only thing in common was the "cause" of the exception:
> {noformat}
> Caused by: java.sql.SQLNonTransientConnectionException: (conn=17) unexpected
> end of stream, read 0 bytes from 4 (socket was closed by server){noformat}
>
> I found that there must be an issue with the configuration of the
> BasicDataSource and I saw these properties are not set and cannot be set:
>
> {code:java}
> basicDataSource.setTestOnBorrow(true);
> basicDataSource.setValidationQuery("select 1"); // Is different by database.
> See list here:
> https://stackoverflow.com/questions/10684244/dbcp-validationquery-for-different-databases
>
> basicDataSource.setValidationQueryTimeout(2);
> {code}
>
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