bq. (a) The behavior of this command. Clearly, it will conflict with the MapReduce JHS - only one of them can be started on the same node.
Yes,Since the PID <http://(a) The behavior of this command. Clearly, it will conflict with the MapReduce JHS - only one of them can be started on the same node.> file will be same. This problem will not present in branch-2.9 + as pid file will be suffix with mapred(for JHS) <https://github.com/apache/hadoop/blob/branch-2.9/hadoop-mapreduce-project/bin/mr-jobhistory-daemon.sh#L93>and yarn (for AHS) <https://github.com/apache/hadoop/blob/branch-2.9/hadoop-yarn-project/hadoop-yarn/bin/yarn-daemon.sh#L95>..i.e PID is exported on each daemon script. May be, 1) Change the name 2) Create PID based on the CLASS Name, here applicationhistoryserver and jobhistoryserver 3) Use same as branch-2.9..i.e suffixing with mapred or yarn @allen, any thoughts on this..? On Wed, Nov 22, 2017 at 2:46 AM, Vinod Kumar Vavilapalli <vino...@apache.org > wrote: > >> - $HADOOP_YARN_HOME/sbin/yarn-daemon.sh start historyserver doesn't > even work. Not just deprecated in favor of timelineserver as was advertised. > > > > This works for me in trunk and the bash code doesn’t appear to > have changed in a very long time. Probably something local to your > install. (I do notice that the deprecation message says “starting” which > is awkward when the stop command is given though.) Also: is the > deprecation message even true at this point? > > > Sorry, I mischaracterized the problem. > > The real issue is that I cannot use this command line when the MapReduce > JobHistoryServer is already started on the same machine. > > ~/tmp/yarn$ $HADOOP_YARN_HOME/sbin/yarn-daemon.sh start historyserver > WARNING: Use of this script to start YARN daemons is deprecated. > WARNING: Attempting to execute replacement "yarn --daemon start" instead. > DEPRECATED: Use of this command to start the timeline server is deprecated. > Instead use the timelineserver command for it. > Starting the History Server anyway... > historyserver is running as process 86156. Stop it first. > > So, it looks like in shell-scripts, there can ever be only one daemon of a > given name, irrespective of which daemon scripts are invoked. > > We need to figure out two things here > (a) The behavior of this command. Clearly, it will conflict with the > MapReduce JHS - only one of them can be started on the same node. > (b) We need to figure out if this V1 TimelineService should even be > support given ATSv2. > > @Vrushani / @Rohith / @Varun Saxena et.al, if you are watching, please > comment on (b). > > Thanks > +Vinod -- --Brahma Reddy Battula
