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From "ASF GitHub Bot (JIRA)" <server-...@james.apache.org>
Subject [jira] [Commented] (JAMES-2386) Data Source Pool is not validating connections
Date Fri, 04 May 2018 13:26:00 GMT

    [ https://issues.apache.org/jira/browse/JAMES-2386?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16463862#comment-16463862
] 

ASF GitHub Bot commented on JAMES-2386:
---------------------------------------

Github user rouazana commented on a diff in the pull request:

    https://github.com/apache/james-project/pull/113#discussion_r186080909
  
    --- Diff: server/container/guice/jpa-guice/src/main/java/org/apache/james/JPAConfiguration.java
---
    @@ -22,13 +22,20 @@
     import com.google.common.base.Preconditions;
     
     public class JPAConfiguration {
    +
    +    public static final int VALIDATION_NO_TIMEOUT = -1;
    --- End diff --
    
    I meant in one of the parent JPA projects. As you are only making modifications to guice-jpa
related, maybe james-server-jpa-common-guice would be a good candidate. But as this configuration
also is globally related to jpa, puting it into a new interface in apache-james-backend-jpa
project would be a good move I guess.


> 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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