The bug is here on line 121:
https://github.com/openjdk/jdk/blob/586846b84a38d285c5905437e903cfc57f609410...
If `System.out` has been closed, `fdAccess.getHandle()` will return -1. This causes `stdHandles[1]` to have the same value as if the child process's stdout was redirected with `Redirect.PIPE`. This will cause a Pipe to be created here for the child process's STDOUT on line 168:
https://github.com/openjdk/jdk/blob/586846b84a38d285c5905437e903cfc57f609410...
However, the caller of the `ProcessBuilder` is not aware of this and will not drain this pipe. This causes the child process to get stuck when writing to its stdout when the pipe 's buffer is filled up.
The fix is to treat the redirection as `Redirect.DISCARD` when `System.out` and/or `System.err` have been closed.
Ioi Lam has updated the pull request incrementally with two additional commits since the last revision: - Reverted previous unintended commit - 8375654: Exclude all array classes from dynamic CDS archive ------------- Changes: - all: https://git.openjdk.org/jdk/pull/29198/files - new: https://git.openjdk.org/jdk/pull/29198/files/e9006f5e..6ef4a4da Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=29198&range=02 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=29198&range=01-02 Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod Patch: https://git.openjdk.org/jdk/pull/29198.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/29198/head:pull/29198 PR: https://git.openjdk.org/jdk/pull/29198