Package: lttng-tools Version: 2.13.9-1 Severity: normal The image we tested is based on bookworm, during system shutdown, when closing the applications and lttng, we observed lttng consumer randomly crashes with below log message: lttng-consumerd: consumer.c:1638: lttng_consumer_on_read_subbuffer_mmap: Assertion `stream->net_seq_idx != (uint64_t) -1ULL || stream->trace_chunk' failed.
After checking the core dump files, we examined the out_fd of stream is -1 inside lttng_consumer_on_read_subbuffer_mmap(). (gdb) bt #0 0x00007fed75855e3c in ?? () from /usr/lib/x86_64-linux-gnu/libc.so.6 #1 0x00007fed75806fb2 in raise () from /usr/lib/x86_64-linux-gnu/libc.so.6 #2 0x00007fed757f1472 in abort () from /usr/lib/x86_64-linux-gnu/libc.so.6 #3 0x00007fed757f1395 in ?? () from /usr/lib/x86_64-linux-gnu/libc.so.6 #4 0x00007fed757ffeb2 in __assert_fail () from /usr/lib/x86_64-linux-gnu/libc.so.6 #5 0x000055796fb8accd in lttng_consumer_on_read_subbuffer_mmap (stream=0x7fed5c04a5a0, buffer=0x7fed667faff0, padding=3006) at ./src/common/consumer/consumer.c:1638 #6 0x000055796fb9b5e7 in consumer_stream_consume_mmap (ctx=0x5f9, stream=0x7fed5c04a5a0, subbuffer=0x7fed667faff0) at ./src/common/consumer/consumer-stream.c:171 #7 0x000055796fb95d31 in lttng_consumer_read_subbuffer (stream=0x7fed5c04a5a0, ctx=0x557970657fb0, locked_by_caller=<optimized out>) at ./src/common/consumer/consumer.c:3435 #8 0x000055796fb8f1ac in consumer_thread_data_poll (data=0x557970657fb0) at ./src/common/consumer/consumer.c:2742 #9 0x00007fed75854144 in ?? () from /usr/lib/x86_64-linux-gnu/libc.so.6 #10 0x00007fed758d47dc in ?? () from /usr/lib/x86_64-linux-gnu/libc.so.6 (gdb) up 5 #5 0x000055796fb8accd in lttng_consumer_on_read_subbuffer_mmap (stream=0x7fed5c04a5a0, buffer=0x7fed667faff0, padding=3006) at ./src/common/consumer/consumer.c:1638 1638 ./src/common/consumer/consumer.c: No such file or directory. (gdb) p stream->out_fd $2 = -1 This behavior looks similar to the known reported issue : https://bugs.lttng.org/issues/1372, that fix has been merged in master. Is there any plan to backport the fix solution to lttng-tools 2.13.9-1 for bookworm? Thank you! Yong
