[jira] [Commented] (FLINK-4309) Potential null pointer dereference in DelegatingConfiguration#keySet()

[Sunny T (JIRA)]

    [ 
https://issues.apache.org/jira/browse/FLINK-4309?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15420469#comment-15420469
 ] 

Sunny T commented on FLINK-4309:
--------------------------------

Hi,

I would like to work on this issue. However, I am not able to assign the issue 
to myself. How can I assign this issue to myself?

Thanks,
Sunny

> Potential null pointer dereference in DelegatingConfiguration#keySet()
> ----------------------------------------------------------------------
>
>                 Key: FLINK-4309
>                 URL: https://issues.apache.org/jira/browse/FLINK-4309
>             Project: Flink
>          Issue Type: Bug
>            Reporter: Ted Yu
>            Priority: Minor
>
> {code}
>     final int prefixLen = this.prefix == null ? 0 : this.prefix.length();
>     for (String key : this.backingConfig.keySet()) {
>       if (key.startsWith(this.prefix)) {
> {code}
> If this.prefix == null, we would get NPE in startsWith():
> {code}
>     public boolean startsWith(String prefix, int toffset) {
>         char ta[] = value;
>         int to = toffset;
>         char pa[] = prefix.value;
> {code}



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