[KUDU-1651] tserver crash when pushing predicate on dict encoded block with all null values

• Type: Sub-task
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Fix Version/s: 1.0.1, 1.1.0
• Component/s: tablet
• Assignee: Andrew Wong
• Reporter: Dan Burkert
• Created: 26/Sep/16 00:16
• Updated: 27/Sep/16 01:05
• Resolved: 27/Sep/16 01:05

Description

A dictionary encoded block with all null values will cause a crash during predicate pushdown evaluation:

F0925 18:36:14.334450 55020 rowblock.cc:29] Check failed: n_bytes_ > 0 (0 vs. 0) 
*** Check failure stack trace: ***
    @           0x7d421d  google::LogMessage::Fail()
    @           0x7d628c  google::LogMessage::SendToLog()
    @           0x7d3d79  google::LogMessage::Flush()
    @           0x7d6c1f  google::LogMessageFatal::~LogMessageFatal()
    @          0x16cd18b  kudu::SelectionVector::SelectionVector()
    @          0x1667d47  kudu::cfile::CFileIterator::Scan()
    @           0x936517  kudu::tablet::CFileSet::Iterator::MaterializeColumn()
    @           0x946f71  kudu::tablet::DeltaApplier::MaterializeColumn()
    @          0x16abeb3  kudu::MaterializingIterator::MaterializeBlock()
    @          0x16ac0f8  kudu::MaterializingIterator::NextBlock()
    @          0x16ac6fc  kudu::UnionIterator::NextBlock()
    @           0x89d209  kudu::tablet::Tablet::Iterator::NextBlock()
    @           0x79021f  kudu::tserver::TabletServiceImpl::HandleContinueScanRequest()
    @           0x797009  kudu::tserver::TabletServiceImpl::HandleNewScanRequest()
    @           0x7984e2  kudu::tserver::TabletServiceImpl::Scan()
    @           0xa0b078  kudu::rpc::GeneratedServiceIf::Handle()
    @           0xa0bcae  kudu::rpc::ServicePool::RunThread()
    @          0x17b8c71  kudu::Thread::SuperviseThread()
    @     0x7f83f449b184  start_thread
    @     0x7f83f338337d  clone
    @              (nil)  (unknown)