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stack commented on HDFS-9187: ----------------------------- [~iwasakims] Yeah, we should probably get a NullTracer in... Less null-checks all around. Would be htrace-4.0.2? > Check if tracer is null before using it > --------------------------------------- > > Key: HDFS-9187 > URL: https://issues.apache.org/jira/browse/HDFS-9187 > Project: Hadoop HDFS > Issue Type: Bug > Components: tracing > Affects Versions: 2.8.0 > Reporter: stack > > Saw this where an hbase that has not been updated to htrace-4.0.1 was trying > to start: > {code} > Oct 1, 5:12:11.861 AM FATAL org.apache.hadoop.hbase.master.HMaster > Failed to become active master > java.lang.NullPointerException > at org.apache.hadoop.fs.Globber.glob(Globber.java:145) > at org.apache.hadoop.fs.FileSystem.globStatus(FileSystem.java:1634) > at org.apache.hadoop.hbase.util.FSUtils.getTableDirs(FSUtils.java:1372) > at > org.apache.hadoop.hbase.util.FSTableDescriptors.getAll(FSTableDescriptors.java:206) > at > org.apache.hadoop.hbase.master.HMaster.finishActiveMasterInitialization(HMaster.java:619) > at org.apache.hadoop.hbase.master.HMaster.access$500(HMaster.java:169) > at org.apache.hadoop.hbase.master.HMaster$1.run(HMaster.java:1481) > at java.lang.Thread.run(Thread.java:745) > {code} -- This message was sent by Atlassian JIRA (v6.3.4#6332)