User.getCurrent() can cause NPE. -------------------------------- Key: HBASE-4515 URL: https://issues.apache.org/jira/browse/HBASE-4515 Project: HBase Issue Type: Bug Affects Versions: 0.92.0, 0.94.0 Reporter: Jonathan Hsieh
When testing with miniclusters that shutdown and are restarted, sometimes a call to User.getCurrent().getName() NPEs when attempting to restart hbase. Oddly this happens consistently on particular branches and not on others. I don't know or understand why this happens but it has something to do with the getCurrentUGI call in o.a.h.h.security.User.HadoopUser sometimes returning null and sometimes returning data. {code} private HadoopUser() { try { ugi = (UserGroupInformation) callStatic("getCurrentUGI"); if (ugi == null) { LOG.warn("Although successfully retrieved UserGroupInformation" + " it was null!"); } } catch (RuntimeException re) { {code} This patch essentially is a workaround -- it propagates the null so that clients can check and avoid the NPE. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira