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https://issues.apache.org/jira/browse/ORC-1159?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Quanlong Huang resolved ORC-1159.
---------------------------------
Fix Version/s: 1.8.0
Resolution: Fixed
> [C++] Crash when the last stripe is skipped
> -------------------------------------------
>
> Key: ORC-1159
> URL: https://issues.apache.org/jira/browse/ORC-1159
> Project: ORC
> Issue Type: Bug
> Components: C++
> Affects Versions: 1.8.0
> Reporter: Quanlong Huang
> Assignee: Quanlong Huang
> Priority: Blocker
> Fix For: 1.8.0
>
> Attachments: alltypes_non_acid.orc
>
>
> I encountered a crash when using orc-scan to read the attached orc file with
> sargs "id < 10".
> {code:java}
> Program received signal SIGSEGV, Segmentation fault.
> 0x0000000000764039 in orc::RowReaderImpl::next (data=..., this=0xf67610) at
> /home/quanlong/workspace/orc/c++/src/Reader.cc:1153
> 1153 if (enableEncodedBlock) {
> (gdb) bt
> #0 0x0000000000764039 in orc::RowReaderImpl::next (data=..., this=0xf67610)
> at /home/quanlong/workspace/orc/c++/src/Reader.cc:1153
> #1 orc::RowReaderImpl::next (this=0xf67610, data=...) at
> /home/quanlong/workspace/orc/c++/src/Reader.cc:1122
> #2 0x0000000000745646 in scanFile(std::ostream&, char const*, unsigned long,
> orc::RowReaderOptions const&) () at
> /home/quanlong/workspace/orc/tools/src/FileScan.cc:34
> #3 0x0000000000741883 in main () at
> /home/quanlong/workspace/orc/tools/src/FileScan.cc:58
> #4 0x00007ffff68ab840 in __libc_start_main (main=0x7416c0 <main>, argc=2,
> argv=0x7fffffffdd48, init=<optimized out>, fini=<optimized out>,
> rtld_fini=<optimized out>, stack_end=0x7fffffffdd38) at
> ../csu/libc-start.c:291
> #5 0x0000000000745479 in _start () at
> /home/quanlong/workspace/orc/tools/src/FileScan.cc:49
> (gdb) p reader
> $1 = std::unique_ptr<orc::ColumnReader> = {get() = 0x0}
> {code}
> Codes:
> {code:java}
> if (enableEncodedBlock) {
> reader->nextEncoded(data, rowsToRead, nullptr);
> }
> else {
> reader->next(data, rowsToRead, nullptr);
> }
> {code}
> {{reader}} is a nullptr thus the process crashes.
> The bug is introduced by a recent improvement (ORC-969). When
> startNextStripe() skippes all the remaining stripes, we should set rowsToRead
> to 0.
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