poolStartup.m is throwing an error

Hello, I am trying to set up a parfor loop that will connect to the database and pull data. At this point I need to load the driver in every iteration of the parfor loop. I tried adding this piece of code to the poolStartup.m file but the pool creation keels over. How can I load the driver to the workers when they initiate?

javaclasspath(which('org.postgresql.Driver'));

Any thoughts appreciated.

[Edric Ellis]

Is there any error printed in the command window? Does it help to use javaaddpath instead of javaclasspath?

[Markella]

Hi Edric, Thanks, javaaddpath seemed to not keel over the worker initiation. However it still doesn't load the driver. I get errors trying to use setdbprefs or fetch.

Initial error stackflow below:

The client lost connection to lab 1. This might be due to network problems,
or the interactive matlabpool job might have errored.

Error using parallel.internal.validator.Validator/notifyFailStageErrorThrown
(line 407)
Expected input to be a row vector.

Error in parallel.internal.validator.Validator/runJobStage (line 305)
                obj.notifyFailStageErrorThrown(profileName, stageName, err,
                commandWindowOutput, debugLog);

Error in parallel.internal.validator.Validator/runValidationStages (line
208)
                currStagePassed = obj.runJobStage(profileName, cluster,
                currStage);

Error in parallel.internal.validator.Validator/validate (line 104)
            hasPassed = obj.runValidationStages(profileName);

Error in parallel.internal.ui.ValidationManager/validate (line 45)
            obj.Validator.validate(profileName);

com.mathworks.jmi.MatlabException: Expected input to be a row vector.
  at com.mathworks.jmi.NativeMatlab.SendMatlabMessage(Native Method)
  at com.mathworks.jmi.NativeMatlab.sendMatlabMessage(NativeMatlab.java:219)
  at com.mathworks.jmi.MatlabLooper.sendMatlabMessage(MatlabLooper.java:120)
  at com.mathworks.jmi.Matlab.mtFevalConsoleOutput(Matlab.java:1608)
  at com.mathworks.jmi.MatlabWorker.feval(MatlabWorker.java:195)
  at com.mathworks.jmi.MatlabWorker.feval(MatlabWorker.java:172)
  at com.mathworks.toolbox.distcomp.ui.profile.model.ValidationManager$2.runOnMatlabThread(ValidationManager.java:120)
  at com.mathworks.jmi.MatlabWorker$2.run(MatlabWorker.java:79)
  at com.mathworks.jmi.NativeMatlab.dispatchMTRequests(NativeMatlab.java:364)

[Friedrich]

sounds like the worker crash (SegV). Is a crash log created in tempdir? (trype tempdir in MATLAB to get the path to your temporary directory)

[Markella]

Hi Friedrich, unfortunately not! When I try and validate the profile, I can see ta couple of files created but they are both empty.