Could you also check what 16152 is? The jsvc is a launcher process, not the JVM itself.
As I mentioned, JPS is pretty reliable, just wont' show the name of the JVM launched by a custom wrapper - and will show just PID. On Mon, Nov 26, 2012 at 7:35 PM, a...@hsk.hk <a...@hsk.hk> wrote: > Hi, > > Thanks for your reply. > > However, I think 16152 should not be the DN, since > 1) my second try of "/usr/local/hadoop/bin/hadoop-daemon.sh start datanode" > says 16117 (i.e. I ran start datanode twice), and > 2) ps axu | grep 16117, I got > root 16117 0.0 0.0 17004 904 pts/2 S 21:34 0:00 jsvc.exec > -Dproc_datanode -outfile /usr/local/hadoop-1.0.4/libexec/ ... > > These are the two reasons that I think JPS is no longer a tool to check > secure DN. > > Thanks again! > > > On 26 Nov 2012, at 9:47 PM, Harsh J wrote: > >> The 16152 should be the DN JVM I think. This is a jps limitation, as >> seen at http://docs.oracle.com/javase/1.5.0/docs/tooldocs/share/jps.html >> and jsvc (which secure mode DN uses) is such a custom launcher. >> >> "The jps command uses the java launcher to find the class name and >> arguments passed to the main method. If the target JVM is started with >> a custom launcher, the class name (or JAR file name) and the arguments >> to the main method will not be available. In this case, the jps >> command will output the string Unknownfor the class name or JAR file >> name and for the arguments to the main method." >> >> On Mon, Nov 26, 2012 at 7:11 PM, a...@hsk.hk <a...@hsk.hk> wrote: >>> Hi, >>> >>> A question: >>> I started Secure DN then ran JPS as root, I could not find any running DN: >>> 16152 >>> 16195 Jps >>> >>> However, when I tried to start the secure DN again, I got: >>> Warning: $HADOOP_HOME is deprecated. >>> datanode running as process 16117. Stop it first. >>> >>> Does it mean JPS is no longer a tool to check DN in secure mode? >>> >>> Thanks >>> >>> >>> On 26 Nov 2012, at 9:03 PM, a...@hsk.hk wrote: >>> >>>> Hi Harsh, >>>> >>>> Thank you very much for your reply, got it! >>>> >>>> Thanks >>>> ac >>>> >>>> On 26 Nov 2012, at 8:32 PM, Harsh J wrote: >>>> >>>>> Secure DN needs to be started as root (it runs as proper user, but >>>>> needs to be started as root to grab reserved ports), and needs a >>>>> proper jsvc binary (for your arch/OS) available. Are you using >>>>> tarballs or packages (and if packages, are they from Bigtop)? >>>>> >>>>> On Mon, Nov 26, 2012 at 5:21 PM, a...@hsk.hk <a...@hsk.hk> wrote: >>>>>> Hi, >>>>>> >>>>>> I am setting up HDFS security with Kerberos: >>>>>> When I manually started the first datanode, I got the following messages >>>>>> (the namenode is started): >>>>>> >>>>>> 1) INFO org.apache.hadoop.security.UserGroupInformation: Login >>>>>> successful for user .... >>>>>> 2) ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: >>>>>> java.lang.RuntimeException: Cannot start secure cluster without >>>>>> privileged resources. >>>>>> >>>>>> OS: Ubuntu 12.04 >>>>>> Hadoop: 1.0.4 >>>>>> >>>>>> It seems that it could login successfully but something is missing >>>>>> Please help! >>>>>> >>>>>> Thanks >>>>>> >>>>>> >>>>>> >>>>>> >>>>> >>>>> >>>>> >>>>> -- >>>>> Harsh J >>>> >>> >> >> >> >> -- >> Harsh J > -- Harsh J
