You are viewing a plain text version of this content. The canonical link for it is here.

Posted to dev@kafka.apache.org by "lujie (JIRA)" <ji...@apache.org> on 2018/05/13 10:07:00 UTC

[jira] [Created] (KAFKA-6899) An Potential NPE

lujie created KAFKA-6899:
----------------------------

             Summary: An Potential NPE
                 Key: KAFKA-6899
                 URL: https://issues.apache.org/jira/browse/KAFKA-6899
             Project: Kafka
          Issue Type: Bug
            Reporter: lujie


We have developed a static analysis tool [NPEDetector|https://github.com/lujiefsi/NPEDetector] to find some potential NPE. Our analysis shows that some callees may return null in corner case(e.g. node crash , IO exception), some of their callers have  _!=null_ check but some do not have. 

*Bug:*

callee JaasConfig#getAppConfigurationEntry  can return null, it has 13 callers, 11 of the callers have the null checker while using the return value, 2 of them have no checker :
{code:java}
//caller1:KerberosLogin#login(Stirng, callback)
AppConfigurationEntry entries[] = Configuration.getConfiguration().getAppConfigurationEntry(loginContextName);
for (AppConfigurationEntry entry: entries) {}//may NPE

//caller2:KerberosLogin#login()
AppConfigurationEntry[] entries = configuration().getAppConfigurationEntry(contextName());
if (entries.length == 0)/may NPE
{code}
I am not sure these two are bug o or not, please correct me without any without any hesitation.



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)