mbalassi opened a new pull request, #1194:
URL: https://github.com/apache/flink-kubernetes-operator/pull/1194
JobStatusObserver capped JobManager exception text in K8s events byline
count (stacktrace.split("\n"), keep first N lines). A single unbroken line of
any size produces one array element, so it bypassed the cap entirely and could
fill the operator heap.
# Approach
- Replaced `events.exceptions.stacktrace-lines` (line count, default 5)
with `events.exceptions.stacktrace.max.length` (character count, default
2048 — matches the two existing sibling options
`exception.stacktrace.max.length` / `exception.field.max.length`; no
config in the repo defaults to 4096, so 2048 was kept rather than
raised).
- Replaced the truncation itself: stacktrace.length() >
maxStackTraceLength + bounded substring, instead of splitting on \n.
Also removes an unbounded 3-4x string-copy chain downstream of the old
cap.
- Old option removed outright (no value-preserving migration exists
between line-count and character-count semantics).
- Added a regression test (5000-char single line, no newlines) and
updated existing tests, generated config docs, and hand-written
event-format docs (both locales).
# Testing
Updated existing unit test and added a new test to explicitly cover the bug
scenario reported in FlINK-40452.
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