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I am trying to configure a linux cluster for MpJ-Express. I have set the PATH and MPJ_HOME correctly.

When i run the command mpjboot machines

I am getting the following message.

mpjboot machines
grep: :/home/actdir/mpj-v0_38/conf/wrapper.conf: No such file or directory

java.lang.ArrayIndexOutOfBoundsException: 1 at runtime.starter.PortScan.main(PortScan.java:42) mpjboot found port busy on head machine. There are two possibilities: (1) The daemon might already be running... (2) If the daemon is not running, then set a different port by modifying the wrapper.app.parameter.2 property in the :/home/actdir/mpj-v0_38/conf/wrapper.conf file

The machines file is supposed to contain host names. even if i change the host names and verify the port number usage Iam getting the same error.

Plese suggest me about the error.

Govardhan Tanniru
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1 Answers1

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I think the wrapper.conf file is not accessible or available for mpjboot. The error above shows that it fails to get port number from wrapper.conf (no such file or directory erro). In PortScan.java information about the port number is missing thats why you are getting ArrayIndexOutOfBoundException.
I would suggest you to check if your shared filesystem is working properly (NFS is working fine).In MPJ Express 0.38 release you need to have shared filesystem i.e. a single view of $MPJ_HOME directory is visible to all the nodes. If you still see this error you can enable debugging by following userguide and share logs on mpjexpress mailing list

Pedro Lobito
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mohsan
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