[Swift-user] execution error

[Sheri Mickelson]

Thanks, that fixed it.

-Sheri

On Mar 16, 2012, at 5:10 PM, Michael Wilde wrote:

> Hi Sheri,
>
> This is a Swift bug (not seen before to my knowledge). Your script  
> trips into it in these lines starting at line 275:
>
> string monHSIfiles[] = readData(monHSIFileList);
> ...
> string datapath;
> if (monHSIfiles[1] == " "){
>  datapath = msroot;
> } else {
>  datapath = wrkdir;
> }
>
> I suspect that in your test case, monHSIFileList has less than 2  
> lines in it. The array monHSIfiles is "closed", I think, because its  
> returned from readData(). But element [1] of the array doesn't  
> exist. Did you mean to test element[0] for being equal to " "?  Does  
> monHSIFileList get set with an end-of-filelist sentinel of " "?
>
> I think if you work through the intent here, you can avoid testing  
> an element that doesnt exist.
>
> How Swift *should* behave here needs to be discussed and defined  
> precisely in the User Guide and implementation.
>
> - Mike
>
> ps.
>
> Here's the test that reproduces it:
>
> $ cat 1filename
> foo
> $ cat 2filenames
> foo
> bar
> $ cat b1.swift
> string fnames[] = readData(@arg("flist"));
>
> if (fnames[1] == " "){
>  trace("blank");
> } else {
>  trace("nonblank");
> }
>
> $ swift b1.swift -flist=2filenames
> no sites file specified, setting to default: /Users/wilde/swift/src/ 
> trunk/cog/modules/swift/dist/swift-svn/etc/sites.xml
> Swift trunk swift-r5690 cog-r3361
>
> RunID: 20120316-1700-f7ev3njf
> Progress:  time: Fri, 16 Mar 2012 17:00:50 -0500
> SwiftScript trace: nonblank
> Final status: Fri, 16 Mar 2012 17:00:50 -0500
> $ swift b1.swift -flist=1filename
> no sites file specified, setting to default: /Users/wilde/swift/src/ 
> trunk/cog/modules/swift/dist/swift-svn/etc/sites.xml
> Swift trunk swift-r5690 cog-r3361
>
> RunID: 20120316-1700-1xah6tge
> Progress:  time: Fri, 16 Mar 2012 17:00:57 -0500
> Execution failed:
> 	First operand is null
> $
>
>
> ----- Original Message -----
>> From: "Sheri Mickelson" <mickelso at mcs.anl.gov>
>> To: "Michael Wilde" <wilde at mcs.anl.gov>
>> Cc: swift-user at ci.uchicago.edu
>> Sent: Friday, March 16, 2012 2:35:34 PM
>> Subject: Re: [Swift-user] execution error
>> Hi Mike,
>>
>> Here's a copy of the log file. It happens consistently with the same
>> settings.
>>
>> Thanks, Sheri
>>
>>
>>
>>
>>
>> On Mar 16, 2012, at 2:21 PM, Michael Wilde wrote:
>>
>>> Hi Sheri,
>>>
>>> Can you point us to the entire log file?
>>>
>>> Does it happen repeatedly? Same script, same point? Or sporadically?
>>>
>>> Thanks,
>>>
>>> - Mike
>>>
>>> ----- Original Message -----
>>>> From: "Sheri Mickelson" <mickelso at mcs.anl.gov>
>>>> To: swift-user at ci.uchicago.edu
>>>> Sent: Friday, March 16, 2012 1:05:12 PM
>>>> Subject: [Swift-user] execution error
>>>> Hi,
>>>>
>>>> I'm seeing this error message when I'm trying to execute a Swift
>>>> script:
>>>>
>>>> Execution failed:
>>>> First operand is null
>>>>
>>>> Here's the information from the log file:
>>>>
>>>> 2012-03-16 11:54:58,725-0600 DEBUG VDL2ExecutionContext First
>>>> operand
>>>> is null
>>>> First operand is null
>>>>
>>>> at
>>>> org.griphyn.vdl.karajan.lib.Operators.vdlop_eq(Operators.java:181)
>>>> at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
>>>> at
>>>> sun
>>>> .reflect
>>>> .DelegatingMethodAccessorImpl
>>>> .invoke(DelegatingMethodAccessorImpl.java:
>>>> 43)
>>>> at java.lang.reflect.Method.invoke(Method.java:616)
>>>> at
>>>> org
>>>> .globus
>>>> .cog
>>>> .karajan
>>>> .workflow
>>>> .nodes
>>>> .functions.FunctionsCollection.function(FunctionsCollection.java:
>>>> 82)
>>>> at
>>>> org
>>>> .globus
>>>> .cog
>>>> .karajan
>>>> .workflow
>>>> .nodes.functions.AbstractFunction.post(AbstractFunction.java:
>>>> 27)
>>>> at
>>>> org
>>>> .globus
>>>> .cog
>>>> .karajan
>>>> .workflow
>>>> .nodes
>>>> .AbstractSequentialWithArguments
>>>> .futureModified(AbstractSequentialWithArguments.java:208)
>>>> at org.griphyn.vdl.karajan.DSHandleFutureWrapper
>>>> $1.run(DSHandleFutureWrapper.java:63)
>>>> at java.util.concurrent.Executors
>>>> $RunnableAdapter.call(Executors.java:
>>>> 471)
>>>> at
>>>> java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
>>>> at java.util.concurrent.FutureTask.run(FutureTask.java:166)
>>>> at
>>>> java
>>>> .util
>>>> .concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:
>>>> 1110)
>>>> at java.util.concurrent.ThreadPoolExecutor
>>>> $Worker.run(ThreadPoolExecutor.java:603)
>>>> at java.lang.Thread.run(Thread.java:636)
>>>>
>>>>
>>>> I'm having trouble finding the bug in my Swift code. What type of
>>>> error usually causes this message?
>>>>
>>>> Thanks, Sheri
>>>> _______________________________________________
>>>> Swift-user mailing list
>>>> Swift-user at ci.uchicago.edu
>>>> https://lists.ci.uchicago.edu/cgi-bin/mailman/listinfo/swift-user
>>>
>>> --
>>> Michael Wilde
>>> Computation Institute, University of Chicago
>>> Mathematics and Computer Science Division
>>> Argonne National Laboratory
>>>
>
> -- 
> Michael Wilde
> Computation Institute, University of Chicago
> Mathematics and Computer Science Division
> Argonne National Laboratory
>