How can I see where the sjavac_server is started?

[Magnus Ihse Bursie]

On 2019-02-27 16:51, Erik Joelsson wrote:
> Hello Andrew,
>
> On 2019-02-26 12:09, Andrew Haley wrote:
>> I'm seeing a crash in the javac server while building openjdk.
> We are seeing this too intermittently.
>> I want to run the exact same command that started the server running,
>> but even with LOG=debug I cannot find the command line that starts
>> it. The command seems not to be there at all.
>>
>> So, how exactly does the javac server get started, and how do I find
>> the command line that started it?
> The server is started lazily by the first javac invocation that needs 
> it. There is a parameter given to javac that describes how it should 
> be started, but to get the exact command line, you would have to 
> instrument javac java source. You should be able to add additional 
> parameters to that JVM, at least by editing spec.gmk, that could help 
> you with diagnostics.
>> And, incidentally, given that I'f configured with --disable-sjavac,
>> why is the build running a javac server? Thanks.
>>
> The "smart javac" and the javac server are not one the same. The 
> server was introduced in sjavac, but the server part was later ported 
> over to javac proper (I think). So now we have two configure 
> arguments, --enable-sjavac and --disable-javac-server. The latter is 
> what you are looking for.
>
> I think we should really get rid of sjavac since the relevant benefits 
> are already present in the default build, with the javac server and 
> the dependency plugin. The only possible benefit of sjavac today would 
> be more fine grained incremental build support, but I doubt it works 
> very well given that it's not being maintained.

Agree. I opened https://bugs.openjdk.java.net/browse/JDK-8219973.

/Magnus

>
> /Erik
>