Zoltán Borók-Nagy created IMPALA-8969:
-----------------------------------------
Summary: Grouping aggregator can cause segmentation fault when
doing multiple aggregations.
Key: IMPALA-8969
URL: https://issues.apache.org/jira/browse/IMPALA-8969
Project: IMPALA
Issue Type: Bug
Reporter: Zoltán Borók-Nagy
The following query deterministically crashes Impala:
{noformat}
select group_concat(distinct cast(l_orderkey as string))),
group_concat(distinct(l_comment))) from tpch_parquet.lineitem group by
l_comment{noformat}
The stack trace during the crash:
{noformat}
#0 0x00007fd3f605a428 in raise () from /lib/x86_64-linux-gnu/libc.so.6 #1
0x00007fd3f605c02a in abort () from /lib/x86_64-linux-gnu/libc.so.6 #2
0x00007fd3fa8ad149 in ?? () from
/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/amd64/server/libjvm.so #3
0x00007fd3faa60d27 in ?? () from
/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/amd64/server/libjvm.so #4
0x00007fd3fa8b6e4f in JVM_handle_linux_signal () from
/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/amd64/server/libjvm.so #5
0x00007fd3fa8a9e48 in ?? () from
/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/amd64/server/libjvm.so #6 <signal
handler called> #7 0x00007fd400105bfa in impala::Tuple::IsNull (this=0x0,
offset=...) at /home/boroknagyz/Impala/be/src/runtime/tuple.h:247 #8
0x00007fd3fd1c16d2 in impala::AggFnEvaluator::SerializeOrFinalize
(this=0x75da4c0, src=0x0, dst_slot_desc=..., dst=0x0, fn=0x7fd3fd1cdc08
<impala::AggregateFunctions::StringValSerializeOrFinalize(impala_udf::FunctionContext*,
impala_udf::StringVal const&)>) at
/home/boroknagyz/Impala/be/src/exprs/agg-fn-evaluator.cc:398 #9
0x00007fd3fddbeb3a in impala::AggFnEvaluator::Serialize (this=0x75da4c0,
tuple=0x0) at /home/boroknagyz/Impala/be/src/exprs/agg-fn-evaluator.h:267 #10
0x00007fd3fddbebe3 in impala::AggFnEvaluator::Serialize (evals=..., dst=0x0) at
/home/boroknagyz/Impala/be/src/exprs/agg-fn-evaluator.h:296 #11
0x00007fd3fde4e847 in impala::GroupingAggregator::AddBatchStreamingImpl
(this=0xd392300, agg_idx=1, needs_serialize=true,
prefetch_mode=impala::TPrefetchMode::HT_BUCKET, in_batch=0xb7746c0,
out_batch=0x758e040, ht_ctx=0xb336f80, remaining_capacity=0x7fd353bb6c40) at
/home/boroknagyz/Impala/be/src/exec/grouping-aggregator-ir.cc:204 #12
0x00007fd3fde3e426 in impala::GroupingAggregator::AddBatchStreaming
(this=0xd392300, state=0x7006e00, out_batch=0x758e040, child_batch=0xb7746c0,
eos=0x7fd353bb6f0e) at
/home/boroknagyz/Impala/be/src/exec/grouping-aggregator.cc:459 #13
0x00007fd3fdfa2773 in impala::StreamingAggregationNode::GetRowsStreaming
(this=0x6205c00, state=0x7006e00, out_batch=0x758e040) at
/home/boroknagyz/Impala/be/src/exec/streaming-aggregation-node.cc:160 #14
0x00007fd3fdfa1616 in impala::StreamingAggregationNode::GetNext
(this=0x6205c00, state=0x7006e00, row_batch=0x758e040, eos=0x7fd353bb74c7) at
/home/boroknagyz/Impala/be/src/exec/streaming-aggregation-node.cc:76 #15
0x00007fd3fe9ea566 in impala::FragmentInstanceState::ExecInternal
(this=0x703b1e0) at
/home/boroknagyz/Impala/be/src/runtime/fragment-instance-state.cc:368 #16
0x00007fd3fe9e6e39 in impala::FragmentInstanceState::Exec (this=0x703b1e0) at
/home/boroknagyz/Impala/be/src/runtime/fragment-instance-state.cc:93 #17
0x00007fd3fea51c9d in impala::QueryState::ExecFInstance (this=0x6f9b200,
fis=0x703b1e0) at /home/boroknagyz/Impala/be/src/runtime/query-state.cc:650 #18
0x00007fd3fea4ff6a in impala::QueryState::<lambda()>::operator()(void) const
(__closure=0x7fd353bb7ca8) at
/home/boroknagyz/Impala/be/src/runtime/query-state.cc:558 #19
0x00007fd3fea5397f in
boost::detail::function::void_function_obj_invoker0<impala::QueryState::StartFInstances()::<lambda()>,
void>::invoke(boost::detail::function::function_buffer &)
(function_obj_ptr=...) at
/opt/Impala-Toolchain/boost-1.57.0-p3/include/boost/function/function_template.hpp:153
#20 0x00007fd4005266f4 in boost::function0<void>::operator()
(this=0x7fd353bb7ca0) at
/opt/Impala-Toolchain/boost-1.57.0-p3/include/boost/function/function_template.hpp:767
#21 0x00007fd40020a44f in impala::Thread::SuperviseThread(std::string const&,
std::string const&, boost::function<void ()>, impala::ThreadDebugInfo const*,
impala::Promise<long, (impala::PromiseMode)0>*) (name=..., category=...,
functor=..., parent_thread_info=0x7fd354bbb950, thread_started=0x7fd354bba8f0)
at /home/boroknagyz/Impala/be/src/util/thread.cc:360 #22 0x00007fd400213e13 in
boost::_bi::list5<boost::_bi::value<std::string>,
boost::_bi::value<std::string>, boost::_bi::value<boost::function<void ()> >,
boost::_bi::value<impala::ThreadDebugInfo*>,
boost::_bi::value<impala::Promise<long, (impala::PromiseMode)0>*>
>::operator()<void (*)(std::string const&, std::string const&,
boost::function<void ()>, impala::ThreadDebugInfo const*, impala::Promise<long,
(impala::PromiseMode)0>*), boost::_bi::list0>(boost::_bi::type<void>, void
(*&)(std::string const&, std::string const&, boost::function<void ()>,
impala::ThreadDebugInfo const*, impala::Promise<long,
(impala::PromiseMode)0>*), boost::_bi::list0&, int) (this=0x739f1c0,
f=@0x739f1b8: 0x7fd40020a0e8 <impala::Thread::SuperviseThread(std::string
const&, std::string const&, boost::function<void ()>, impala::ThreadDebugInfo
const*, impala::Promise<long, (impala::PromiseMode)0>*)>, a=...) at
/opt/Impala-Toolchain/boost-1.57.0-p3/include/boost/bind/bind.hpp:525 #23
0x00007fd400213d37 in boost::_bi::bind_t<void, void (*)(std::string const&,
std::string const&, boost::function<void ()>, impala::ThreadDebugInfo const*,
impala::Promise<long, (impala::PromiseMode)0>*),
boost::_bi::list5<boost::_bi::value<std::string>,
boost::_bi::value<std::string>, boost::_bi::value<boost::function<void ()> >,
boost::_bi::value<impala::ThreadDebugInfo*>,
boost::_bi::value<impala::Promise<long, (impala::PromiseMode)0>*> >
>::operator()() (this=0x739f1b8) at
/opt/Impala-Toolchain/boost-1.57.0-p3/include/boost/bind/bind_template.hpp:20
#24 0x00007fd400213cfa in boost::detail::thread_data<boost::_bi::bind_t<void,
void (*)(std::string const&, std::string const&, boost::function<void ()>,
impala::ThreadDebugInfo const*, impala::Promise<long,
(impala::PromiseMode)0>*), boost::_bi::list5<boost::_bi::value<std::string>,
boost::_bi::value<std::string>, boost::_bi::value<boost::function<void ()> >,
boost::_bi::value<impala::ThreadDebugInfo*>,
boost::_bi::value<impala::Promise<long, (impala::PromiseMode)0>*> > > >::run()
(this=0x739f000) at
/opt/Impala-Toolchain/boost-1.57.0-p3/include/boost/thread/detail/thread.hpp:116
#25 0x0000000000a3bcaa in thread_proxy () #26 0x00007fd3fb60a6ba in
start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0 #27
0x00007fd3f612c41d in clone () from /lib/x86_64-linux-gnu/libc.so.6
{noformat}
The problem is in be/src/exec/grouping-aggregator-ir.cc:204:
{noformat}
AggFnEvaluator::Serialize(agg_fn_evals_, out_batch_iter.Get()->GetTuple(0));
{noformat}
GetTuple() should be called with 'agg_idx' instead of zero.
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