It looks to me that the method ChunkHeader::awaitFinished [0] can potentially read an incorrect offset when checking the status. The correct offset is first set [1] but every time we go through the loop, it's advanced (as a side-effect of reading) [2] and never reset. The right pattern for this seems to be the one here [3].

Note: this observation is based on static code-analysis only, I have not verified it with an actual test and there could be something that I'm overlooking.

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[0] - https://github.com/openjdk/jdk/blob/jdk-19+13/src/jdk.jfr/share/classes/jdk/jfr/internal/consumer/ChunkHeader.java#L166
[1] - https://github.com/openjdk/jdk/blob/jdk-19+13/src/jdk.jfr/share/classes/jdk/jfr/internal/consumer/ChunkHeader.java#L172
[2] - https://github.com/openjdk/jdk/blob/jdk-19+13/src/jdk.jfr/share/classes/jdk/jfr/internal/consumer/ChunkHeader.java#L174
[3] - https://github.com/openjdk/jdk/blob/jdk-19+13/src/jdk.jfr/share/classes/jdk/jfr/internal/consumer/ChunkHeader.java#L118