Erik, Jaroslav: Thanks!

I need one official Reviewer to have a look as well.

Thanks,
/Staffan


On 1 jul 2014, at 10:23, Erik Gahlin <[email protected]> wrote:

> Looks good!
> 
> Erik
> 
> Staffan Larsen skrev 2014-07-01 09:38:
>> Please review this test fix.
>> 
>> webrev: http://cr.openjdk.java.net/~sla/8048687/webrev.00/
>> bug: https://bugs.openjdk.java.net/browse/JDK-8048687
>> 
>> The test tries to start a process but fails with:
>> 
>> 
>> ----------System.out:(35/1961)----------
>> vmOpts:
>> javaOpts: -Xmixed -server -XX:MaxRAMFraction=8 -XX:+CreateMinidumpOnCrash 
>> -XX:ReservedCodeCacheSize=256M
>> Command line: 
>> [/export/local/aurora/sandbox/sca/vmsqe/jdk/nightly/fastdebug/rt_baseline/macosx-amd64/bin/java
>>  -classpath 
>> /export/local/aurora/sandbox/results/workDir/classes/1/com/sun/jdi  -Xmixed 
>> -server -XX:MaxRAMFraction=8 -XX:+CreateMinidumpOnCrash 
>> -XX:ReservedCodeCacheSize=256M 
>> -agentlib:jdwp=transport=dt_socket,server=y,suspend=y,address=61682 
>> HelloWorld ]
>> ...
>> ----------System.err:(16/856)----------
>> [process1] Error: Could not find or load main class
>> Failed to start a process (thread dump follows)
>> 
>> 
>> At first glance the command line looks ok, but what I missed here is that 
>> there are two spaces before "-Xmixed". Two spaces in a command line is ok, 
>> but in this case it means that the String[] argument to ProcessBuilder has 
>> one empty String element. That is not ok since that would turn into an 
>> actual empty argument to the process. We can actually see this in the output 
>> from the process, too:
>> 
>>   [process1] Error: Could not find or load main class
>> 
>> If it was the HelloWorld class that could not be found it should have said:
>> 
>>   [process1] Error: Could not find or load main class HelloWorld
>> 
>> But now it is the empty string class that we can't find.
>> 
>> The fix makes sure there are no empty Strings in the process arguments.
>> 
>> Thanks,
>> /Staffan
> 

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