from hive trunk i can only see this I am not sure I am 100% sure but I remember setting up HADOOP_HOME always
http://svn.apache.org/repos/asf/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/MapRedTask.java String hadoopExec = conf.getVar(HiveConf.ConfVars.HADOOPBIN); this change was introduced in 0.8 from http://svn.apache.org/repos/asf/hive/branches/branch-0.9/common/src/java/org/apache/hadoop/hive/conf/HiveConf.java <http://svn.apache.org/repos/asf/hive/branches/branch-0.8/common/src/java/org/apache/hadoop/hive/conf/HiveConf.java> HADOOPBIN("hadoop.bin.path", System.getenv("HADOOP_HOME") + "/bin/hadoop"), On Wed, Jul 18, 2012 at 10:38 PM, kulkarni.swar...@gmail.com < kulkarni.swar...@gmail.com> wrote: > 0.9 > > > On Wed, Jul 18, 2012 at 12:04 PM, Nitin Pawar <nitinpawar...@gmail.com>wrote: > >> this also depends on what version of hive you are using >> >> >> On Wed, Jul 18, 2012 at 10:33 PM, kulkarni.swar...@gmail.com < >> kulkarni.swar...@gmail.com> wrote: >> >>> Thanks for your reply nitin. >>> >>> Ok. So you mean we always need to set HADOOP_HOME irrespective of >>> "hadoop" is on the path or not. Correct? >>> >>> Little confused because that contradicts what's mentioned here[1]. >>> >>> [1] >>> https://cwiki.apache.org/confluence/display/Hive/GettingStarted#GettingStarted-RunningHive >>> >>> >>> Thanks, >>> >>> On Wed, Jul 18, 2012 at 11:59 AM, Nitin Pawar >>> <nitinpawar...@gmail.com>wrote: >>> >>>> This is not a bug. >>>> >>>> even if hadoop was path, hive does not use it. >>>> Hive internally uses HADOOP_HOME in the code base. So you will always >>>> need to set that for hive. >>>> Where as for HADOOP clusters, HADOOP_HOME is deprecated but hive still >>>> needs it. >>>> >>>> Don't know if that answers your question >>>> >>>> Thanks, >>>> Nitin >>>> >>>> >>>> On Wed, Jul 18, 2012 at 10:01 PM, kulkarni.swar...@gmail.com < >>>> kulkarni.swar...@gmail.com> wrote: >>>> >>>>> Hello, >>>>> >>>>> The hive documentation states that either HADOOP_HOME should be set or >>>>> hadoop should be on the path. However for some cases, where HADOOP_HOME >>>>> was >>>>> not set but hadoop was on path, I have seen this error pop up: >>>>> >>>>> java.io.IOException: *Cannot run program "null/bin/hadoop" *(in >>>>> directory "/root/swarnim/hive-0.9.0-cern1-SNAPSHOT"): java.io.IOException: >>>>> error=2, No such file or directory >>>>> at java.lang.ProcessBuilder.start(ProcessBuilder.java:460) >>>>> at java.lang.Runtime.exec(Runtime.java:593) >>>>> at java.lang.Runtime.exec(Runtime.java:431) >>>>> at >>>>> org.apache.hadoop.hive.ql.exec.MapRedTask.execute(MapRedTask.java:268) >>>>> at org.apache.hadoop.hive.ql.exec.Task.executeTask(Task.java:134) >>>>> at >>>>> org.apache.hadoop.hive.ql.exec.TaskRunner.runSequential(TaskRunner.java:57) >>>>> at org.apache.hadoop.hive.ql.Driver.launchTask(Driver.java:1326) >>>>> at org.apache.hadoop.hive.ql.Driver.execute(Driver.java:1118) >>>>> at org.apache.hadoop.hive.ql.Driver.run(Driver.java:951) >>>>> at >>>>> org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:258) >>>>> at >>>>> org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:215) >>>>> at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:406) >>>>> at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:689) >>>>> at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:557) >>>>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) >>>>> at >>>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) >>>>> at >>>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) >>>>> at java.lang.reflect.Method.invoke(Method.java:597) >>>>> at org.apache.hadoop.util.RunJar.main(RunJar.java:208) >>>>> >>>>> Digging into the code in MapRedTask.java, I found the following >>>>> (simplified): >>>>> >>>>> String *hadoopExec* = conf.getVar(System.getenv("HADOOP_HOME") + >>>>> "/bin/hadoop"); >>>>> ... >>>>> >>>>> Runtime.getRuntime().exec(*hadoopExec*, env, new File(workDir)); >>>>> >>>>> Clearly, if HADOOP_HOME is not set, the command that it would try to >>>>> execute is "null/bin/hadoop" which is exactly the exception I am getting. >>>>> >>>>> Has anyone else run into this before? Is this a bug? >>>>> >>>>> Thanks, >>>>> -- >>>>> Swarnim >>>>> >>>> >>>> >>>> >>>> -- >>>> Nitin Pawar >>>> >>>> >>> >>> >>> -- >>> Swarnim >>> >> >> >> >> -- >> Nitin Pawar >> >> > > > -- > Swarnim > -- Nitin Pawar
