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Update JCA to 2.4.12 - #51
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JCA 2.4.12 fixes a reconnect bug seen on Java 11 and later; epics2web runs on Java 21 (epics-base/jca#86, fixed by #87). A send that failed partway through re-establishing a subscription left its request buffer in a bad state, and a later reconnect then threw IndexOutOfBoundsException in EventAddRequest.resubscribeSubscription. That subscription was never restored, leaving a monitor connected but receiving nothing, as a frozen PV looks. The other changes since 2.4.10 are CA name server support and release tooling. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
slominskir
approved these changes
Oct 4, 2026
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Updates
org.epics:jcafrom 2.4.10 to 2.4.12.Why
2.4.12 fixes a reconnect bug seen on Java 11 and later (epics-base/jca#86, fixed by #87). epics2web runs on Java 21.
IndexOutOfBoundsExceptioninEventAddRequest.resubscribeSubscription, and the subscription was never restored.Production logs don't show that exception, so it isn't confirmed as the cause of the frozen PVs. It's a cheap, low-risk fix of a failure mode that matches them.
The other changes since 2.4.10 are CA name server support and Sonatype release tooling.
Checks
./gradlew spotlessCheck testpasses.docker compose -f build.yaml up --waitwith the new jar: all 22 integration tests passed twice. The frozen detector flagged nothing, and the only unexpected-lookingSEVERElines were the IOC disconnectsHealthcheckTestcauses on purpose.docker pause) behaved the same with 2.4.12 as with 2.4.10. Restarts recovered cleanly. Hangs still cause the duplicate updates of Monitors deliver every update twice after an IOC circuit becomes unresponsive and recovers (CAJ) #48, which 2.4.12 doesn't fix.🤖 Generated with Claude Code