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Posted to issues@hawq.apache.org by "Paul Guo (JIRA)" <ji...@apache.org> on 2016/09/26 08:56:20 UTC
[jira] [Updated] (HAWQ-1077) Table insert hangs due to stack
overwrite which is caused by a bug in ao snappy code
[ https://issues.apache.org/jira/browse/HAWQ-1077?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Paul Guo updated HAWQ-1077:
---------------------------
Summary: Table insert hangs due to stack overwrite which is caused by a bug in ao snappy code (was: Query hangs due to stack overwrite which is caused by a bug in ao snappy code)
> Table insert hangs due to stack overwrite which is caused by a bug in ao snappy code
> ------------------------------------------------------------------------------------
>
> Key: HAWQ-1077
> URL: https://issues.apache.org/jira/browse/HAWQ-1077
> Project: Apache HAWQ
> Issue Type: Bug
> Reporter: Paul Guo
> Assignee: Paul Guo
>
> Found this issue during testing. Tthe query has never ended during tests. After quick check, we found that QE process spins and further gdb debugging shows that it is because of a ao snappy code which leads to stack overwrite.
> The stack is similar to this:
> #0 0x00000000008607c4 in gp_trycompress_new (sourceData=0x2eec5b0 "\340\352\356\002", sourceLen=0,
> compressedBuffer=0xa2b3b4 "\311\303UH\211\345H\211}\370H\213E\370\307@<", compressedBufferWithOverrrunLen=38253,
> maxCompressedLen=32767, compressedLen=0xf8c800a29636, compressLevel=0, compressor=0x5d9cdf <snappy_compress_internal>,
> compressionState=0x2eee690) at gp_compress.c:56
> #1 0x0000000000a2a1c6 in AppendOnlyStorageWrite_CompressAppend (storageWrite=0x2eec558,
> sourceData=0x33efa68 "ata value for text data typelarge data value for text data typelarge data value for text data typelarge data value for text data typelarge data value for text data typelarge data value for text data t"..., sourceLen=0,
> executorBlockKind=2, itemCount=0, compressedLen=0x7fffa7804f74, bufferLen=0x7fffa7804f70) at cdbappendonlystoragewrite.c:1255
> #2 0x0000000000a2ae1b in AppendOnlyStorageWrite_Content (storageWrite=0x2eec558, content=0x33e7a70 "\242\241:\200\351\003",
> contentLen=3842464, executorBlockKind=2, rowCount=1) at cdbappendonlystoragewrite.c:1868
> #3 0x000000000056b805 in appendonly_insert (aoInsertDesc=0x2eec460, instup=0x33e7a70, tupleOid=0x7fffa7805094,
> aoTupleId=0x7fffa7805080) at appendonlyam.c:2030
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