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Posted to issues@flink.apache.org by "Jark Wu (Jira)" <ji...@apache.org> on 2020/12/07 02:39:00 UTC
[jira] [Updated] (FLINK-19435) jdbc JDBCOutputFormat open function
invoke Class.forName(drivername)
[ https://issues.apache.org/jira/browse/FLINK-19435?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jark Wu updated FLINK-19435:
----------------------------
Description:
when we sink data to multi jdbc outputformat ,
{code}
protected void establishConnection() throws SQLException, ClassNotFoundException {
Class.forName(drivername);
if (username == null) {
connection = DriverManager.getConnection(dbURL);
} else {
connection = DriverManager.getConnection(dbURL, username, password);
}
}
{code}
may cause jdbc driver deadlock. it need to change to synchronized function.
was:
when we sink data to multi jdbc outputformat ,
```
protected void establishConnection() throws SQLException, ClassNotFoundException {
Class.forName(drivername);
if (username == null) {
connection = DriverManager.getConnection(dbURL);
} else {
connection = DriverManager.getConnection(dbURL, username, password);
}
}
```
may cause jdbc driver deadlock. it need to change to synchronized function.
> jdbc JDBCOutputFormat open function invoke Class.forName(drivername)
> --------------------------------------------------------------------
>
> Key: FLINK-19435
> URL: https://issues.apache.org/jira/browse/FLINK-19435
> Project: Flink
> Issue Type: Improvement
> Components: Connectors / JDBC
> Affects Versions: 1.10.2
> Reporter: xiaodao
> Priority: Major
> Fix For: 1.10.3
>
> Attachments: image-2020-10-09-20-48-48-261.png, image-2020-10-09-20-49-23-644.png
>
>
> when we sink data to multi jdbc outputformat ,
> {code}
> protected void establishConnection() throws SQLException, ClassNotFoundException {
> Class.forName(drivername);
> if (username == null) {
> connection = DriverManager.getConnection(dbURL);
> } else {
> connection = DriverManager.getConnection(dbURL, username, password);
> }
> }
> {code}
> may cause jdbc driver deadlock. it need to change to synchronized function.
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