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Posted to issues-all@impala.apache.org by "Quanlong Huang (Jira)" <ji...@apache.org> on 2020/08/25 23:29:00 UTC
[jira] [Resolved] (IMPALA-9955) Internal error for a query with
large rows and spilling
[ https://issues.apache.org/jira/browse/IMPALA-9955?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Quanlong Huang resolved IMPALA-9955.
------------------------------------
Fix Version/s: Impala 4.0
Resolution: Fixed
> Internal error for a query with large rows and spilling
> -------------------------------------------------------
>
> Key: IMPALA-9955
> URL: https://issues.apache.org/jira/browse/IMPALA-9955
> Project: IMPALA
> Issue Type: Bug
> Reporter: Quanlong Huang
> Assignee: Quanlong Huang
> Priority: Major
> Fix For: Impala 4.0
>
> Attachments: impalad.INFO, impalad_node1.INFO, impalad_node2.INFO
>
>
> Encounter a query failure due to internal error:
> {code:java}
> create table bigstrs stored as parquet as select *, repeat(uuid(), cast(random() * 100000 as int)) as bigstr from functional.alltypes;
> set MAX_ROW_SIZE=3.5MB;
> set MEM_LIMIT=4GB;
> set DISABLE_CODEGEN=true;
> create table my_cnt stored as parquet as select count(*) as cnt, bigstr from bigstrs group by bigstr;
> {code}
> The error is
> {code:java}
> ERROR: Internal error: couldn't pin large page of 4194304 bytes, client only had 2097152 bytes of unused reservation:
> <BufferPool::Client> 0xcf9dae0 internal state: {<BufferPool::Client> 0xbdf6ac0 name: GroupingAggregator id=3 ptr=0xcf9d900 write_status: buffers allocated 2097152 num_pages: 2094 pinned_bytes: 41943040 dirty_unpinned_bytes: 0 in_flight_write_bytes: 0 reservation: {<ReservationTracker>: reservation_limit 9223372036854775807 reservation 46137344 used_reservation 44040192 child_reservations 0 parent:
> <ReservationTracker>: reservation_limit 9223372036854775807 reservation 46137344 used_reservation 0 child_reservations 46137344 parent:
> <ReservationTracker>: reservation_limit 9223372036854775807 reservation 46137344 used_reservation 0 child_reservations 46137344 parent:
> <ReservationTracker>: reservation_limit 3435973836 reservation 46137344 used_reservation 0 child_reservations 46137344 parent:
> <ReservationTracker>: reservation_limit 6647046144 reservation 46137344 used_reservation 0 child_reservations 46137344 parent:
> NULL}
> 12 pinned pages: <BufferPool::Page> 0xc9160a0 len: 2097152 pin_count: 1 buf: <BufferPool::BufferHandle> 0xc916118 client: 0xcf9dae0/0xbdf6ac0 data: 0x13200000 len: 2097152
> <BufferPool::Page> 0xc919d40 len: 4194304 pin_count: 1 buf: <BufferPool::BufferHandle> 0xc919db8 client: 0xcf9dae0/0xbdf6ac0 data: 0x124600000 len: 4194304
> <BufferPool::Page> 0xd42aaa0 len: 4194304 pin_count: 1 buf: <BufferPool::BufferHandle> 0xd42ab18 client: 0xcf9dae0/0xbdf6ac0 data: 0x12b200000 len: 4194304
> <BufferPool::Page> 0xd42b900 len: 4194304 pin_count: 1 buf: <BufferPool::BufferHandle> 0xd42b978 client: 0xcf9dae0/0xbdf6ac0 data: 0x132a00000 len: 4194304
> <BufferPool::Page> 0xd42d3e0 len: 2097152 pin_count: 1 buf: <BufferPool::BufferHandle> 0xd42d458 client: 0xcf9dae0/0xbdf6ac0 data: 0xc6a00000 len: 2097152
> <BufferPool::Page> 0xd42dd40 len: 4194304 pin_count: 1 buf: <BufferPool::BufferHandle> 0xd42ddb8 client: 0xcf9dae0/0xbdf6ac0 data: 0x132e00000 len: 4194304
> <BufferPool::Page> 0xd42de80 len: 4194304 pin_count: 1 buf: <BufferPool::BufferHandle> 0xd42def8 client: 0xcf9dae0/0xbdf6ac0 data: 0x137c00000 len: 4194304
> <BufferPool::Page> 0x12d48320 len: 4194304 pin_count: 1 buf: <BufferPool::BufferHandle> 0x12d48398 client: 0xcf9dae0/0xbdf6ac0 data: 0x102c00000 len: 4194304
> <BufferPool::Page> 0x12d483c0 len: 4194304 pin_count: 1 buf: <BufferPool::BufferHandle> 0x12d48438 client: 0xcf9dae0/0xbdf6ac0 data: 0x108a00000 len: 4194304
> <BufferPool::Page> 0x12d48780 len: 4194304 pin_count: 1 buf: <BufferPool::BufferHandle> 0x12d487f8 client: 0xcf9dae0/0xbdf6ac0 data: 0x108e00000 len: 4194304
> <BufferPool::Page> 0x12d492c0 len: 2097152 pin_count: 1 buf: <BufferPool::BufferHandle> 0x12d49338 client: 0xcf9dae0/0xbdf6ac0 data: 0x127600000 len: 2097152
> <BufferPool::Page> 0x12d4a9e0 len: 2097152 pin_count: 1 buf: <BufferPool::BufferHandle> 0x12d4aa58 client: 0xcf9dae0/0xbdf6ac0 data: 0x12d200000 len: 2097152
> 0 dirty unpinned pages:
> 0 in flight write pages: }
> {code}
> Found the stacktrace from the log:
> {code}
> @ 0x1c9dfbe impala::Status::Status()
> @ 0x1ca5a78 impala::Status::Status()
> @ 0x2bfe4ec impala::BufferedTupleStream::NextReadPage()
> @ 0x2c04b72 impala::BufferedTupleStream::GetNextInternal<>()
> @ 0x2c029e6 impala::BufferedTupleStream::GetNextInternal<>()
> @ 0x2bffd19 impala::BufferedTupleStream::GetNext()
> @ 0x28aa43f impala::GroupingAggregator::ProcessStream<>()
> @ 0x28a2e17 impala::GroupingAggregator::BuildSpilledPartition()
> @ 0x28a2401 impala::GroupingAggregator::NextPartition()
> @ 0x289df5a impala::GroupingAggregator::GetRowsFromPartition()
> @ 0x289db20 impala::GroupingAggregator::GetNext()
> @ 0x28dbfc7 impala::AggregationNode::GetNext()
> @ 0x2259dfc impala::FragmentInstanceState::ExecInternal()
> @ 0x22564a0 impala::FragmentInstanceState::Exec()
> @ 0x22801ed impala::QueryState::ExecFInstance()
> @ 0x227e5ef _ZZN6impala10QueryState15StartFInstancesEvENKUlvE_clEv
> @ 0x2281d8e _ZN5boost6detail8function26void_function_obj_invoker0IZN6impala10QueryState15StartFInstancesEvEUlvE_vE6invokeERNS1_15function_bufferE
> @ 0x204d7d1 boost::function0<>::operator()()
> @ 0x26702d5 impala::Thread::SuperviseThread()
> @ 0x2678272 boost::_bi::list5<>::operator()<>()
> @ 0x2678196 boost::_bi::bind_t<>::operator()()
> @ 0x2678157 boost::detail::thread_data<>::run()
> @ 0x3e45d71 thread_proxy
> @ 0x7fc8339656b9 start_thread
> @ 0x7fc8305314dc clone
> {code}
> From the codes, the comment indicates that there is a bug:
> {code:c++}
> Status BufferedTupleStream::NextReadPage(ReadIterator* read_iter) {
> ...
> int64_t read_page_len = read_iter->read_page_->len();
> if (!pinned_ && read_page_len > default_page_len_
> && buffer_pool_client_->GetUnusedReservation() < read_page_len) {
> // If we are iterating over an unpinned stream and encounter a page that is larger
> // than the default page length, then unpinning the previous page may not have
> // freed up enough reservation to pin the next one. The client is responsible for
> // ensuring the reservation is available, so this indicates a bug.
> return Status(TErrorCode::INTERNAL_ERROR, Substitute("Internal error: couldn't pin "
> "large page of $0 bytes, client only had $1 bytes of unused reservation:\n$2",
> read_page_len, buffer_pool_client_->GetUnusedReservation(),
> buffer_pool_client_->DebugString()));
> }
> {code}
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