Hello Erik, I think a fix for the first problem is by far the most important. Reordering of stdout/stderr probably happens rarely (since most of the time there is no output on stderr).
Best regards, Ralf -----Original Message----- From: Erik Joelsson [mailto:erik.joels...@oracle.com] Sent: Dienstag, 10. Juli 2018 19:34 To: Schmelter, Ralf <ralf.schmel...@sap.com>; build-dev@openjdk.java.net Subject: Re: Problems creating *.obj.log files Hello Ralf, Very interesting analysis! I have spent a lot of time trying to get the piping to log files, while keeping out/err separation working with as little performance impact as possible. I was aware of problem 3, which causes some annoying output ordering sometimes, but I had not encountered 1 and 2 before. Checking my latest local Windows build, I do indeed have some truncated files, not as many as you, but still 79 (less virus scanning). That would certainly make incremental builds unreliable. I tried your suggestion for problem 1 and it works for me too. We should definitely get that fix in. I have filed JDK-8207001. Do you mind if I use your patch for it? I agree on the only solution for the 3rd problem, but I would not want to go there. Delaying output can have lots of weird consequences, if you for example interrupt a build with ctrl-c. Another option would be to revert to our previous solution, where we used this script: http://hg.openjdk.java.net/jdk8u/jdk8u/file/090b27d25e19/common/bin/logger.sh The problem with that was performance as it created more extra shell instances for each compile command. The only solution to fix problem 2 would be to stop separating out/err. I wonder how big of a problem that actually is though? /Erik
