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https://issues.apache.org/jira/browse/KUDU-2987?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Adar Dembo resolved KUDU-2987.
------------------------------
Fix Version/s: 1.11.1
1.12.0
Resolution: Fixed
> Intra location rebalance will crash in special case
> ---------------------------------------------------
>
> Key: KUDU-2987
> URL: https://issues.apache.org/jira/browse/KUDU-2987
> Project: Kudu
> Issue Type: Bug
> Reporter: ZhangYao
> Assignee: ZhangYao
> Priority: Major
> Fix For: 1.12.0, 1.11.1
>
>
> Recently I am doing POC about rebalance and I get core when running intra
> location rebalance.
> Here is the log:
> {code:java}
> I2019-10-30 20:02:17.843044 40915 rebalancer_tool.cc:225] running rebalancer
> within location '/location/2044'
> F2019-10-30 20:02:17.884591 40915 map-util.h:109] Check failed: it !=
> collection.end() Map key not found: a9119004b2d24f42a1acf09d142565fb
> *** Check failure stack trace: ***
> @ 0x111a75d google::LogMessage::Fail()
> @ 0x111c6d3 google::LogMessage::SendToLog()
> @ 0x111a2b9 google::LogMessage::Flush()
> @ 0x111d0ef google::LogMessageFatal::~LogMessageFatal()
> @ 0xe26da7 FindOrDie<>()
> @ 0xe1f204
> kudu::tools::RebalancerTool::AlgoBasedRunner::GetNextMovesImpl()
> @ 0xe162e0
> kudu::tools::RebalancerTool::BaseRunner::GetNextMoves()
> @ 0xe15bf5 kudu::tools::RebalancerTool::RunWith()
> @ 0xe1db0e kudu::tools::RebalancerTool::Run()
> @ 0xb6fea1 kudu::tools::(anonymous namespace)::RunRebalance()
> @ 0xb70e14 std::_Function_handler<>::_M_invoke()
> @ 0x11714a2 kudu::tools::Action::Run()
> @ 0xc00587 kudu::tools::DispatchCommand()
> @ 0xc00f4b kudu::tools::RunTool()
> @ 0xb0fd6d main
> @ 0x7f37086a4b15 __libc_start_main
> @ 0xb6b399 (unknown)
> {code}
> I found it may be the problem in
> {{RebalancerTool::AlgoBasedRunner::GetNextMovesImpl}} when building
> extra_info_by_tablet_id, it check that the table id in tablet must occur in
> table info. But when we build ClusterRawInfo in
> {{RebalancerTool::KsckResultsToClusterRawInfo}} we only collect the table
> occurs in location but all tablets in cluster.
> This problem will occur when the location doesn't have replica for all
> table. When location is far more than table's replica it will happen.
>
>
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