[
https://issues.apache.org/jira/browse/TRAFODION-1431?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Work on TRAFODION-1431 started by Qifan Chen.
---------------------------------------------
> Compiler dumps core when compiling load transform query with ESP colocation
> feature is on
> -----------------------------------------------------------------------------------------
>
> Key: TRAFODION-1431
> URL: https://issues.apache.org/jira/browse/TRAFODION-1431
> Project: Apache Trafodion
> Issue Type: Bug
> Components: sql-cmp
> Affects Versions: 1.1 (pre-incubation)
> Reporter: Qifan Chen
> Assignee: Qifan Chen
> Labels: patch
>
> Conditions.
> 1. The query loads data into a salted HBase table.
> 2. The ESP colocation feature is turned on (via CQD TRAF_ALLOW_ESP_COLOCATION
> 'ON')
> The stack trace is as follows.
> #7 NAHeap::unlinkLargeFragment (this=0x7fca76a004c8, treeFrag=0x7fca70350ea0)
> at ../common/NAMemory.cpp:1869
> #8 0x00007fca95a4d463 in unlinkFragment (this=0x7fca76a004c8, addr=<value
> optimized out>)
> at ../common/NAMemory.cpp:1957
> #9 NAHeap::deallocateHeapMemory (this=0x7fca76a004c8, addr=<value optimized
> out>)
> at ../common/NAMemory.cpp:3625
> #10 0x00007fca90b17aba in NodeMap::getPopularNodeNumber (this=0x7fca73b73de8,
> beginPos=<value optimized out>, endPos=5) at ../optimizer/NodeMap.cpp:1305
> #11 0x00007fca90bef2eb in FileScan::synthHbaseScanPhysicalProperty
> (this=0x7fca7034e0b8,
> context=0x7fca7034a700, planNumber=<value optimized out>,
> sortOrderVEG=...)
> at ../optimizer/OptPhysRelExpr.cpp:15046
> #12 0x00007fca90bf2f70 in FileScan::synthPhysicalProperty
> (this=0x7fca7034e0b8,
> myContext=0x7fca7034a700, planNumber=-1, pws=<value optimized out>)
> Root cause analysis. During compilation for the load transform query, the
> partition function for scans is range partitioned. The node ID field in the
> node map for a range partitioning function is always -1. In the method to
> find out the most populate node for an ESP, the node Id value of -1 is used
> to access the -1th entry in the frequency array. Hence the crash.
> Repair: the Node Id population logic is moved to createNodeMapForHbase() and
> all code paths to create a node map for HBase table will go through the
> function. In addition, a check is added to prevent writing to the -1th entry
> in the array.
> Workaround: turn off the CQD (set to 'off').
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
