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

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 1.1.2, 1.2.0
• Assignee: Sunny T
• Reporter: Ted Yu
• Created: 03/Aug/16 01:16
• Updated: 16/Aug/16 10:41
• Resolved: 16/Aug/16 10:41

Description

    final int prefixLen = this.prefix == null ? 0 : this.prefix.length();

    for (String key : this.backingConfig.keySet()) {
      if (key.startsWith(this.prefix)) {

If this.prefix == null, we would get NPE in startsWith():

    public boolean startsWith(String prefix, int toffset) {
        char ta[] = value;
        int to = toffset;
        char pa[] = prefix.value;

Issue Links

• links to: GitHub Pull Request #2371