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Avoid attempted use of NULL pointer in parallel compression code (#3786)

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The parallel compression test code tests for the case where all MPI ranks have no selection in a dataset when writing to it. Add an early exit to the code to avoid attempting to use a NULL pointer due to there being no work to do.
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jhendersonHDF 2023-10-27 23:20:29 -05:00 committed by GitHub
parent 1bcef50b86
commit edb5cffdb2
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src/H5Dmpio.c
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@ -3782,6 +3782,10 @@ H5D__mpio_redistribute_shared_chunks_int(H5D_filtered_collective_io_info_t *chun
counts_disps_array = H5MM_xfree(counts_disps_array);
}
/* No useful work to do - exit */
if (coll_chunk_list_num_entries == 0)
HGOTO_DONE(SUCCEED);
/*
* Phase 2 - Involved ranks now redistribute any shared chunks to new
* owners as necessary.