[YARN-5706] Fail to launch SLSRunner due to NPE

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha2
• Fix Version/s: 3.0.0-alpha2
• Component/s: scheduler-load-simulator
• Labels: oct16-easy
• Hadoop Flags: Reviewed
• Assignee: Kai
• Reporter: Kai
• Created: 04/Oct/16 13:47
• Updated: 22/Dec/16 00:42
• Resolved: 22/Dec/16 00:42

Description

java.lang.NullPointerException
	at org.apache.hadoop.yarn.sls.web.SLSWebApp.<init>(SLSWebApp.java:88)
	at org.apache.hadoop.yarn.sls.scheduler.SLSCapacityScheduler.initMetrics(SLSCapacityScheduler.java:459)
	at org.apache.hadoop.yarn.sls.scheduler.SLSCapacityScheduler.setConf(SLSCapacityScheduler.java:153)
	at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:76)

CLASSPATH for html resource is not configured properly.

DEBUG: Injecting share/hadoop/tools/sls/html into CLASSPATH
DEBUG: Rejected CLASSPATH: share/hadoop/tools/sls/html (does not exist)

This issue can be reproduced when doing according to the documentation instruction.
http://hadoop.apache.org/docs/current/hadoop-sls/SchedulerLoadSimulator.html

$ cd $HADOOP_ROOT/share/hadoop/tools/sls
$ bin/slsrun.sh
  --input-rumen |--input-sls=<TRACE_FILE1,TRACE_FILE2,...>
  --output-dir=<SLS_SIMULATION_OUTPUT_DIRECTORY> [--nodes=<SLS_NODES_FILE>]
    [--track-jobs=<JOBID1,JOBID2,...>] [--print-simulation]