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From Yongzhi Wang <wang.yongzhi2...@gmail.com>
Subject No 32-bit taskcontroller on Hadoop 1.0.3
Date Tue, 18 Sep 2012 03:04:38 GMT
Dear All,

I am currently deploying hadoop 1.0.3 on my Debian 32-bit Linux. I
think need a 32-bit binary file taskcontroller. However, I found the
binary
files provided in hadoop 1.0.3 is 64 bit. I downloaded the hadoop
build file from server jenkins
(https://builds.apache.org/job/Hadoop-1.0-Build/ws/trunk/build/c++-build/Linux-i386-32/task-controller/).
It's still a 64 bit file.

I got the following errors when I start task tracker using the hadoop
64-bit taskcontroller:

12/09/17 11:59:58 ERROR mapred.TaskTracker: Can not start task tracker
because java.io.IOException: Task controller setup failed because of
invalidpermissions/ownership with exit code 126
        at org.apache.hadoop.mapred.LinuxTaskController.setup(LinuxTaskController.java:143)
        at org.apache.hadoop.mapred.TaskTracker.<init>(TaskTracker.java:1452)
        at org.apache.hadoop.mapred.TaskTracker.main(TaskTracker.java:3742)
Caused by: org.apache.hadoop.util.Shell$ExitCodeException:
/opt/ywang/hadoop-1.0.3/libexec/../bin/task-controller:
/opt/ywang/hadoop-1.0.3/libexec/../bin/task-controller: cannot execute
binary file

        at org.apache.hadoop.util.Shell.runCommand(Shell.java:255)
        at org.apache.hadoop.util.Shell.run(Shell.java:182)
        at org.apache.hadoop.util.Shell$ShellCommandExecutor.execute(Shell.java:375)
        at org.apache.hadoop.mapred.LinuxTaskController.setup(LinuxTaskController.java:137)

I am wondering if not providing 32-bit of taskcontroller is a build
bug, or 64-bit taskcontroller can be used somehow on the 32-bit
platform? If no 32-bit executable is provided in the daily build of
hadoop, how can I build one by myself?

Thanks!

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