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https://issues.apache.org/jira/browse/AVRO-2227?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Ryan Skraba resolved AVRO-2227.
-------------------------------
Resolution: Duplicate
> CLONE - Python snappy error: "integer out of range for 'I' format code"
> -----------------------------------------------------------------------
>
> Key: AVRO-2227
> URL: https://issues.apache.org/jira/browse/AVRO-2227
> Project: Apache Avro
> Issue Type: Bug
> Components: python
> Affects Versions: 1.5.4
> Environment: Linux michaelc 2.6.38-11-generic #48-Ubuntu SMP Fri Jul
> 29 19:02:55 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
> Ubuntu 11.04
> Python 2.7.1+ (ubuntu stock version)
> avro-1.5.4-py2.7.egg
> snappy-1.0.4 (c library)
> python-snappy-0.3.2
> Reporter: Jennifer b
> Assignee: Michael Cooper
> Priority: Major
> Fix For: 1.6.0
>
>
> The Python library for avro fails to write some blocks when used with snappy
> compression.
> The error is:
> {code}
> Traceback (most recent call last):
> File "tools/json_to_avro.py", line 74, in <module>
> writer.append(line)
> File "/home/michaelc/.python/2.7/avro-1.5.4-py2.7.egg/avro/datafile.py",
> line 185, in append
> self._write_block()
> File "/home/michaelc/.python/2.7/avro-1.5.4-py2.7.egg/avro/datafile.py",
> line 169, in _write_block
> self.encoder.write_crc32(uncompressed_data)
> File "/home/michaelc/.python/2.7/avro-1.5.4-py2.7.egg/avro/io.py", line
> 364, in write_crc32
> self.write(STRUCT_CRC32.pack(crc32(bytes)));
> struct.error: integer out of range for 'I' format code
> {code}
> From my investigation, str(crc32(bytes)) is showing negative integers, so the
> issue seems to be fixed by masking the output.
> This fix appears to work from my limited testing:
> {code}
> --- io.old.py 2011-09-21 14:32:38.992544680 +1000
> +++ io.py 2011-09-21 14:33:11.492544686 +1000
> @@ -360,7 +360,7 @@
> """
> A 4-byte, big-endian CRC32 checksum
> """
> - self.write(STRUCT_CRC32.pack(crc32(bytes)));
> + self.write(STRUCT_CRC32.pack(crc32(bytes) & 0xffffffff));
>
> #
> # DatumReader/Writer
> {code}
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