[
https://issues.apache.org/jira/browse/HAWQ-1077?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Paul Guo updated HAWQ-1077:
---------------------------
Summary: Query hangs due to stack overwrite which is caused by a bug in ao
snappy code (was: QE process spins due to an bug in ao snappy code)
> Query 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: Lei Chang
>
> 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
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
