Eclipse Kura Jenkins executor suddenly disappearing
## Summary
We have observed an increasing amount of build failures on our Jenkins instance lately.
When running the builds on our maintenance branch (`release-5.6.0`) the log output of the build is suddenly truncated, the build seems to fail and the executor does offline.
See: https://ci.eclipse.org/kura/job/multibranch/view/change-requests/job/PR-6336/4/
Currently all executor are offline and the build queue is not being processed.
## Steps to reproduce
Run a maintenance branch build (See: https://ci.eclipse.org/kura/job/multibranch/view/change-requests/job/PR-6336/4/)
## What is the current bug behavior?
Build suddenly fails, cutting off any log output from the executor. Executor goes offline.
## What is the expected correct behavior?
## Relevant logs and/or screenshots
## Priority
- [ ] Urgent
- [X] High
- [ ] Medium
- [ ] Low
## Severity
- [X] Blocker
- [ ] Major
- [ ] Normal
- [ ] Low
## Impact
All work is blocked since we cannot merge our PRs
issue