[
https://issues.apache.org/jira/browse/ARROW-9958?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Kouhei Sutou closed ARROW-9958.
-------------------------------
Resolution: Not A Problem
You need to ensure closing writers and output streams.
For {{example1.py}}:
{noformat}
sink = pa.output_stream(FILE, COMPRESSION_TYPE)
writer = pa.RecordBatchStreamWriter(sink, batch.schema)
for _ in range(5):
writer.write_batch(batch)
writer.close()
sink.close()
{noformat}
For {{example2.py}}:
{noformat}
sink = pa.output_stream(FILE, COMPRESSION_TYPE)
writer = pa.RecordBatchStreamWriter(sink, batch.schema)
for _ in range(5):
writer.write_batch(batch)
writer.close()
sink.close()
{noformat}
> Error writing record batches to IPC streaming format
> ----------------------------------------------------
>
> Key: ARROW-9958
> URL: https://issues.apache.org/jira/browse/ARROW-9958
> Project: Apache Arrow
> Issue Type: Bug
> Components: GLib, Python
> Affects Versions: 1.0.1
> Environment: pyarrow - Version: 1.0.1
> python - version 3.7.6
> Operating system - CentOS Linux release 7.8.2003 (Core)
> Reporter: Ishan
> Priority: Major
> Labels: Compression
> Attachments: example1.py, example2.py
>
>
> Writing record batches to the Arrow IPC streaming format with on-the-fly
> compression generally raises errors of one type or the other when reading it
> back.
> PFA the code producing each of the below errors. I can't reproduce it for
> smaller batch sizes, so it probably has to do with size of each record batch.
> It does not seem specific to pyarrow since I see a similar issue with the
> C-Glib API.
> #Error case 1
> ```
> ~/py376/lib/python3.7/site-packages/pyarrow/ipc.pxi in
> pyarrow.lib._CRecordBatchReader.read_next_batch()
> ~/py376/lib/python3.7/site-packages/pyarrow/error.pxi in
> pyarrow.lib.check_status()
> OSError: Truncated compressed stream
> ```
> #Error case 2
> ```
> ~/py376/lib/python3.7/site-packages/pyarrow/ipc.pxi in
> pyarrow.lib._RecordBatchStreamReader._open()
> ~/py376/lib/python3.7/site-packages/pyarrow/error.pxi in
> pyarrow.lib.pyarrow_internal_check_status()
> ~/py376/lib/python3.7/site-packages/pyarrow/error.pxi in
> pyarrow.lib.check_status()
> ArrowInvalid: Tried reading schema message, was null or length 0
> ```
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