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https://issues.apache.org/jira/browse/FLINK-3750?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15242678#comment-15242678
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ASF GitHub Bot commented on FLINK-3750:
---------------------------------------
Github user zentol commented on a diff in the pull request:
https://github.com/apache/flink/pull/1885#discussion_r59847510
--- Diff:
flink-batch-connectors/flink-jdbc/src/main/java/org/apache/flink/api/java/io/jdbc/JDBCInputFormat.java
---
@@ -119,7 +118,11 @@ private boolean isSplitConfigured() {
return splitColumnName != null;
}
+ /** Perform initialization of the JDBC connection. Done just once per
parallel task */
private void establishConnection() throws SQLException,
ClassNotFoundException {
+ if(dbConn!=null){
--- End diff --
i think we should make this check directly in open() around the
establishConnection() call.
> Make JDBCInputFormat a parallel source
> --------------------------------------
>
> Key: FLINK-3750
> URL: https://issues.apache.org/jira/browse/FLINK-3750
> Project: Flink
> Issue Type: Improvement
> Components: Batch
> Affects Versions: 1.0.1
> Reporter: Flavio Pompermaier
> Assignee: Flavio Pompermaier
> Priority: Minor
> Labels: connector, jdbc
>
> At the moment the batch JDBC InputFormat does not support parallelism
> (NonParallelInput). I'd like to remove such limitation
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