Re: [tracecompass-dev] Fw: incubator version compilation error

[Kevin Mills <kevin.jon.mills@xxxxxxxxx>]

Hi Xiaolin,

I'm not on the tracecompass team, but I do have a successful build of the incubator trace server running on my Linux system.  The only information we have from your failure is the exit code (3).  Looking at the startup code for trace-server, there is an ExitCode class in Application.java that indicates that exit code 3 may be caused by the workspace location already being in use (i.e. maybe there is another tracecompass-server process running.  It might be a long lost zombie process on your system.  Or it might be a .lock file in the workspace folder that was not properly removed when a trace-server process was shut down.  

I can replicate your error by starting one trace-server process (successfully), then starting a second instance of trace-server.  When I do this I get exactly the error you are seeing.  So if you can find a nold trace-server process, try killing it.  If not, then you need to know where the workspace root is (see the getWorkspaceRoot() method below).  By default it will be a folder called ".tracecompass-webapp" your home folder, Check the .metadata folder within that folder for a ".lock" file. If you find one just manually delete it and try starting trace trace-server again.

Default workspace folder lock file: ~/.tracecompass-webapp/.metadata/.lock

It looks like you can also specify a different workspace folder by defining the TRACING_SERVER_ROOT environment variable to point to a different location.  You could try that also.  Try starting trace-server like this:

TRACING_SERVER_ROOT=~/.tracecompass-webapp-other ./trace-server

Hope this helps you get going again.

-Kevin

private enum ExitCode {

OK(""), //$NON-NLS-1$

ERROR_NO_WORKSPACE_ROOT("Trace server error: Workspace root doesn't exist."), //$NON-NLS-1$

ERROR_WORKSPACE_ROOT_PERMISSION("Trace server error: Workspace not writable."), //$NON-NLS-1$

ERROR_WORKSPACE_ALREADY_IN_USE("Trace server error: Workspace already in use."), //$NON-NLS-1$

ERROR_RUNNING_TRACE_SERVER("Trace server error: Error running trace server."); //$NON-NLS-1$

@NonNull private String fErrorText;

private ExitCode(@NonNull String errorText) {

fErrorText = errorText;

}

@NonNull public String getErrorText() {

return fErrorText;

}

}

private static String getWorkspaceRoot() {

/* Look for the environment variable in the global environment variables */

String workspaceRoot = System.getenv().get("TRACING_SERVER_ROOT"); //$NON-NLS-1$

if (workspaceRoot == null) {

/* Use the user's home directory */

workspaceRoot = System.getProperty("user.home"); //$NON-NLS-1$

}

return workspaceRoot;

}

On Mon, Jun 24, 2024 at 1:31 AM Xiaolin Liu via tracecompass-dev <tracecompass-dev@xxxxxxxxxxx> wrote:

Dear all, 

I have been reporting the compiling error for about a week now, but I can find no technical instruction or support online. Please take a detailed look at the error that was generated. The exit code = 3 seems to be generated because the Java memory was not enough to load the program itself. It did not help when I increased the Xms and Xmx limits. What should I do to fix this problem?

Best, 

Xiaolin 

---

From: Xiaolin Liu
Sent: Saturday, June 22, 2024 10:06 PM
To: tracecompass.incubator-dev@xxxxxxxxxxx
Subject: incubator version compilation error

 

Dear all,

I am currently compiling the incubator version of the trace-compass on my Linux system. The Ubuntu version is 20. The building process throws out the exit code = 3 error with DMV terminated so that it might be caused by the Java memory storage. I have manually edited the Xms and the Xmx limit, but the same type of error is popping up. I am not sure what else I could do to get the compilation built successfully. 

I have been stuck at this step for a while and need help. 

Best, 

Xiaolin 

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