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Abhishek commented on KUDU-3226: -------------------------------- Appears to be the issue with the mode _kudu cluster_ which has the following commands: {code:java} kudu cluster rebalance kudu cluster ksck {code} The exact stack trace (from kudu 1.10): F0111 03:11:14.265851 101976 map-util.h:410] Check failed: InsertIfNotPresent(collection, key, data) duplicate key: 98eea16246634b11bea207c6f397daa4 *** Check failure stack trace: *** @ 0x10d392d google::LogMessage::Fail() @ 0x10d5883 google::LogMessage::SendToLog() @ 0x10d3489 google::LogMessage::Flush() @ 0x10d620f google::LogMessageFatal::~LogMessageFatal() @ 0xc94216 InsertOrDie<>() @ 0xc8d59b kudu::tools::Ksck::CheckMasterConsensus() @ 0xc90583 kudu::tools::Ksck::Run() @ 0xc9100a kudu::tools::Ksck::RunAndPrintResults() @ 0xb44981 kudu::tools::(anonymous namespace)::RunKsck() @ 0xb46cb4 std::_Function_handler<>::_M_invoke() @ 0x1129ac2 kudu::tools::Action::Run() @ 0xbcc027 kudu::tools::DispatchCommand() @ 0xbcc9eb kudu::tools::RunTool() @ 0xae595d main @ 0x7fd165440505 __libc_start_main @ 0xb40ea1 (unknown) > Validate List of Masters for kudu ksck > -------------------------------------- > > Key: KUDU-3226 > URL: https://issues.apache.org/jira/browse/KUDU-3226 > Project: Kudu > Issue Type: Improvement > Reporter: David Mollitor > Assignee: Abhishek > Priority: Minor > Labels: beginner, newbie, trivial > > I recently accidentally included a list of masters where I fat-fingered the > host names and included the same node twice. > I got some stack trace and an error message about duplicate keys inserted > into a map. I eventually figured out what I did wrong, but the error > condition was not super helpful. > Please add an early validation step that explicitly captures this conditions > and provides a helpful error message that includes the name of the host name > which was duplicated on the command line. > This happened for me with {{kudu ksck}} but there may be other candidates as > well. -- This message was sent by Atlassian Jira (v8.3.4#803005)