Make runBackground use process IDs
#5115
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arturaz
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May 13, 2025
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runBackground use process IDs.runBackground use process IDs
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Currently the
runBackgrounduses file locks and generated UUIDs for coordination.This sometimes leads to the cases where a new background process is launched while the old one is still running because the JVM seems to release file locks before network sockets.
Because Mill now uses JDK 11, we can use it's APIs to transition to process id based watching, which should alleviate this problem.
0.12.xbranch backport: #5120