[jira] [Created] (IMPALA-5889) Segmentation fault in ScannerContext::Stream::GetBytesInternal(long, unsigned char**, bool, long*)

["Lars Volker (JIRA)" <ji...@apache.org>]

Lars Volker created IMPALA-5889:
-----------------------------------

             Summary: Segmentation fault in ScannerContext::Stream::GetBytesInternal(long, unsigned char**, bool, long*)
                 Key: IMPALA-5889
                 URL: https://issues.apache.org/jira/browse/IMPALA-5889
             Project: IMPALA
          Issue Type: Bug
          Components: Backend
    Affects Versions: Impala 2.8.0, Impala 2.9.0
            Reporter: Lars Volker
            Priority: Critical
         Attachments: aa9eea4a-0e7a-4a6e-e392f98a-39466184.txt

I found several crashes like this one while looking at minidumps from a private cluster. Below is the stack of the crashing thread. I'll also attach a full resolved minidump. I suspect that this happened while Impala was scanning an Avro file while it was being overwritten. I tried to reproduce this but couldn't do so. I also suspect this could be related to IMPALA-4223.

{noformat}
Crash reason:  SIGSEGV
Crash address: 0x7fc302e12000
Process uptime: not available

Thread 587 (crashed)
 0  libc-2.12.so + 0x8995f
    Found by: given as instruction pointer in context
 1  impalad!impala::ScannerContext::Stream::GetBytesInternal(long, unsigned char**, bool, long*) [string-buffer.h : 54 + 0x12]
    Found by: stack scanning
 2  impalad!impala::BaseSequenceScanner::SkipToSync(unsigned char const*, int) [scanner-context.inline.h : 55 + 0x19]
    Found by: call frame info
 3  impalad!impala::BaseSequenceScanner::ProcessSplit() [base-sequence-scanner.cc : 199 + 0x10]
    Found by: call frame info
 4  impalad!impala::HdfsScanNode::ProcessSplit(std::vector<impala::FilterContext, std::allocator<impala::FilterContext> > const&, impala::DiskIoMgr::ScanRange*) [hdfs-scan-node.cc : 526 + 0x11]
    Found by: call frame info
 5  impalad!impala::HdfsScanNode::ScannerThread() [hdfs-scan-node.cc : 417 + 0x18]
    Found by: call frame info
 6  impalad!impala::Thread::SuperviseThread(std::string const&, std::string const&, boost::function<void ()>, impala::Promise<long>*) [function_template.hpp : 767 + 0x7]
    Found by: call frame info
 7  impalad!boost::detail::thread_data<boost::_bi::bind_t<void, void (*)(std::string const&, std::string const&, boost::function<void ()>, impala::Promise<long>*), boost::_bi::list4<boost::_bi::value<std::string>, boost::_bi::value<std::string>, boost::_bi::value<boost::function<void ()> >, boost::_bi::value<impala::Promise<long>*> > > >::run() [bind.hpp : 457 + 0x6]
    Found by: call frame info
 8  impalad!thread_proxy + 0xda
    Found by: call frame info
 9  libpthread-2.12.so + 0x7aa1
    Found by: call frame info
10  libc-2.12.so + 0xe893d
    Found by: stack scanning
{noformat}



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