[EAP 610] Agent: cannot start: No such file or directory

[Johan]

Hi,

I am trying to run the yjpagent on a Tomcat server at a Linux i686 machine. The LD_LIBRARY_PATH has been updated with the correct path. The following lines are found in my Tomcat log:

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[YourKit ... build 610] Using JVMPI
[YourKit ... build 610] *** HINT ***: we recommend using Java 5.0 and JVMTI when possible!
[YourKit ... build 610] cannot start: No such file or directory

After that nothing happens. What file could be missing? The agentlib are clearly found...

Here is the output of ldd libyjpagent.so:

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libc.so.6 => /lib/libc.so.6 (0x40136000)
/lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x80000000)

Here is the output of uname -a:

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Linux asimov 2.4.18-bf2.4 #1 ...time... i686 GNU/Linux

Regards,
Johan Hagelbäck
Developer
Travelstart Nordic

[Vladimir Kondratyev]

Hi Johan,

please try to use experimental libyjpagent.so (build #613) which you can download from out FTP server:

IP: 194.24.241.196
user: ftp
no password

This shared library prints more debug information.

Thank you for assistance,
Vladimir

[Johan]

I got the following exception:

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java.io.IOException: No such file or directory
at java.io.UnixFileSystem.createFileExclusively(Native Method)
at java.io.File.createNewFile(File.java:828)
at com.yourkit.runtime.Core.init(Core.java:201)

/Johan

[Anton Katilin]

The problem is that the profiler agent fails to create an empty file named <user home>/.yjp/.agentQQQQ, where QQQQ - used port number. An attempt to create .yjp directory is made if it does not exist.

Probably this is an issue with permissions.

Are there any special permissions set in the home directory of the user under which you run the profiled application? What do "ls -la ~" and "ls -la ~/.yjp" print?

[Johan]

The /etc/init.d/tomcat4 startup script starts Tomcat with a faked user (tomcat4) with home directory /usr/share/tomcat4. Only root had write access to this directory, and when I changed permissions the agent started without errors.

Thanks for your help!

Regards,
Johan