> A customer reported an error where a well-known system library, upon loading > into the JVM process (via a longish indirect dependency chain), changed the > signal disposition of the process for SIGPIPE to SIG_IGN. This gets inherited > down to child processes, where it caused child processes to not react to > SIGPIPE. > > The system library is clearly at fault here, but the current workaround we > recommend (pre-loading libjsig to interpose incorrect signal handling > requests) is impractical for many customers. It is an okay solution when > customers themselves have uncommon signal handling requirements; but for > cases like these, where some version of system library does that, we should > have a more pragmatic solution. > > See further details and arguments for the fix in this mail thread: > https://mail.openjdk.org/pipermail/core-libs-dev/2025-April/144077.html . > > The behavior is changed changed such that we set SIGPIPE to SIG_DFL in the > child processes, and a regression test is added. Note: Regression test > deliberately prints outs details for other POSIX signals too; this can be > both a good ad-hoc analysis tool as well as a point where we add more tests > for other signals, should we ever need to. This patch, however, is > deliberately restricted to just fixing SIGPIPE.
Thomas Stuefe has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains seven commits: - merge - fix comments about closeDescriptors - Feedback Roger - tolerate sigaction failing - Fixes - fix - start+repro-case ------------- Changes: https://git.openjdk.org/jdk/pull/26615/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26615&range=03 Stats: 196 lines in 5 files changed: 195 ins; 0 del; 1 mod Patch: https://git.openjdk.org/jdk/pull/26615.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/26615/head:pull/26615 PR: https://git.openjdk.org/jdk/pull/26615
