ASF GitHub Bot logged work on BEAM-3500:

                Author: ASF GitHub Bot
            Created on: 11/Mar/18 18:26
            Start Date: 11/Mar/18 18:26
    Worklog Time Spent: 10m 
      Work Description: jkff commented on a change in pull request #4461: 
[BEAM-3500] "Attach" JDBC connection to the bundle and add DataSourceFactory 
allowing full control of the way the DataSource is created
URL: https://github.com/apache/beam/pull/4461#discussion_r173663913

 File path: 
 @@ -297,6 +306,10 @@ public DataSourceConfiguration withConnectionProperties(
       return builder().setConnectionProperties(connectionProperties).build();
+    public DataSourceConfiguration withPoolMaxTotal(int poolMaxTotal) {
 Review comment:
   This parameter has no effect, please remove it. A single DoFn instance is 
used from a single thread, so there will never be more than 1 connection at the 
same time.

This is an automated message from the Apache Git Service.
To respond to the message, please log on GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:

Issue Time Tracking

    Worklog Id:     (was: 79307)
    Time Spent: 3h 20m  (was: 3h 10m)

> JdbcIO: Improve connection management
> -------------------------------------
>                 Key: BEAM-3500
>                 URL: https://issues.apache.org/jira/browse/BEAM-3500
>             Project: Beam
>          Issue Type: Improvement
>          Components: io-java-jdbc
>    Affects Versions: 2.2.0
>            Reporter: Pawel Bartoszek
>            Assignee: Jean-Baptiste Onofré
>            Priority: Major
>          Time Spent: 3h 20m
>  Remaining Estimate: 0h
> JdbcIO write DoFn acquires connection in {{@Setup}} and release it in 
> {{@Teardown}} methods, which means that connection might stay opened for days 
> in streaming job case. Keeping single connection open for so long might be 
> very risky as it's exposed to database, network etc issues.
> *Taking connection from the pool when it is actually needed*
> I suggest that connection would be taken from the connection pool in 
> {{executeBatch}} method and released when the batch is flushed. This will 
> allow the pool to take care of any returned unhealthy connections etc.
> *Make JdbcIO accept data source factory*
>  It would be nice if JdbcIO accepted DataSourceFactory rather than DataSource 
> itself. I am saying that because sink checks if DataSource implements 
> `Serializable` interface, which make it impossible to pass 
> BasicDataSource(used internally by sink) as it doesn’t implement this 
> interface. Something like:
> {code:java}
> interface DataSourceFactory extends Serializable{
>      DataSource create();
> }
> {code}

This message was sent by Atlassian JIRA

Reply via email to