Observed a panic in indexer.log

2024-08-20T03:33:33.587-04:00 [Error] Indexer::persistCodebookToDisk Error observed while initializing codebook dir for instId: 17496810518424195641, partnId: 4, sliceId: 0

2024-08-20T03:33:33.587-04:00 [Error] Indexer::initiateTraining error observed while persisting codebook for instId: 17496810518424195641, partnId: 4, err: mkdir /opt/couchbase/var/lib/couchbase/data/@2i/test_bucket_docloadera12184bdd9304a02afae

99ecfe82b945multiScalarOneVector_2_17496810518424195641_4.index/codebook: no such file or directory

2024-08-20T03:33:33.587-04:00 [Info] Indexer::removeCodebookDir removal successful for instId: 17496810518424195641, partnId: 5, sliceId: 0

2024-08-20T03:33:33.587-04:00 [Info] Indexer::removeCodebookDir removal successful for instId: 17496810518424195641, partnId: 6, sliceId: 0

2024-08-20T03:33:33.587-04:00 [Info] Indexer::removeCodebookDir removal successful for instId: 17496810518424195641, partnId: 3, sliceId: 0

2024-08-20T03:33:33.587-04:00 [Info] Indexer::removeCodebookDir removal successful for instId: 17496810518424195641, partnId: 4, sliceId: 0

panic: assignment to entry in nil map

goroutine 1 [running]:

github.com/couchbase/indexing/secondary/indexer.(*indexer).handleIndexTrainingDone(0x40004fa808, {0x1ff5840?, 0x4007d62c40?})

        /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/indexing/secondary/indexer/indexer.go:13582 +0x89c

github.com/couchbase/indexing/secondary/indexer.(*indexer).handleWorkerMsgs(0x40004fa808, {0x1ff5840, 0x4007d62c40})

        /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/indexing/secondary/indexer/indexer.go:1777 +0xda0

github.com/couchbase/indexing/secondary/indexer.(*indexer).run(0x40004fa808)

        /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/indexing/secondary/indexer/indexer.go:1289 +0x268

github.com/couchbase/indexing/secondary/indexer.NewIndexer(0x4000464090)

        /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/indexing/secondary/indexer/indexer.go:641 +0x21cc

main.main()

        goproj/src/github.com/couchbase/indexing/secondary/cmd/indexer/main.go:207 +0x1004

2024-08-20T03:33:33.844-04:00 [Info] Indexer started with command line: [/opt/couchbase/bin/indexer -adminPort=9100 -scanPort=9101 -httpPort=9102 -streamInitPort=9103 -streamCatchupPort=9104 -streamMaintPort=9105 --httpsPort=19102 --certFile=/opt/couchbase/var/lib/couchbase/config/certs/chain.pem --keyFile=/opt/couchbase/var/lib/couchbase/config/certs/pkey.pem --caFile=/opt/couchbase/var/lib/couchbase/config/certs/ca.pem --clientCertFile=/opt/couchbase/var/lib/couchbase/config/certs/client_chain.pem --clientKeyFile=/opt/couchbase/var/lib/couchbase/config/certs/client_pkey.pem -ipv4=required -ipv6=optional -cluster=127.0.0.1:8091 -storageDir=/opt/couchbase/var/lib/couchbase/data/@2i -diagDir=/opt/couchbase/var/lib/couchbase/crash -logDir=/opt/couchbase/var/lib/couchbase/logs -nodeUUID=ffb6683a48973399f50d3dda6ea3a76b -isEnterprise=true --deploymentModel=default]

2024-08-20T03:33:33.844-04:00 [Info] Indexer DeploymentModel is set to: default 

error_logger:error,2024-08-16T06:18:38.465-04:00,babysitter_of_ns_1@cb.local:<0.251.0>:ale_error_logger_handler:do_log:101]

=========================ERROR REPORT=========================

** Generic server <0.251.0> terminating 

** Last message in was {<0.257.0>,{exit_status,2}}

** When Server state == {state,<0.257.0>,2463,

                         {index,"/opt/couchbase/bin/indexer",

                          ["-adminPort=9100","-scanPort=9101",

                           "-httpPort=9102","-streamInitPort=9103",

                           "-streamCatchupPort=9104","-streamMaintPort=9105",

                           "--httpsPort=19102",

                           "--certFile=/opt/couchbase/var/lib/couchbase/config/certs/chain.pem",

                           "--keyFile=/opt/couchbase/var/lib/couchbase/config/certs/pkey.pem",

                           "--caFile=/opt/couchbase/var/lib/couchbase/config/certs/ca.pem",

                           "--clientCertFile=/opt/couchbase/var/lib/couchbase/config/certs/client_chain.pem",

                           "--clientKeyFile=/opt/couchbase/var/lib/couchbase/config/certs/client_pkey.pem",

                           "-ipv4=required","-ipv6=optional",

                           "-cluster=127.0.0.1:8091",

                           "-storageDir=/opt/couchbase/var/lib/couchbase/data/@2i",

                           "-diagDir=/opt/couchbase/var/lib/couchbase/crash",

                           "-logDir=/opt/couchbase/var/lib/couchbase/logs",

                           "-nodeUUID=ffb6683a48973399f50d3dda6ea3a76b",

                           "-isEnterprise=true","--deploymentModel=default"],

                          [via_goport,exit_status,stderr_to_stdout,

                           {env,

                            [{"GOTRACEBACK","single"},

                             {"GOMAXPROCS","8"},

                             {"CBAUTH_REVRPC_URL",

                              {dynamic,

                               {ns_ports_setup,

                                remote_build_cbauth_revrpc_url,

                                [index]}}}]}]},

                         {ringbuffer,2048,1024,

                          {[{<<"...)\n\t/home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/indexing/secondary/indexer/plasma_slice.go:1172 +0x88\n"...>>,

                             642}],

                           [{<<"panic: runtime error: slice bounds out of range [:4] with capacity 0 [recovered]\n\tpanic: runtime error: slice bounds out of range [:4] with capa"...>>,

                             1406}]}},

                         index,undefined,[],0}

** Reason for termination ==

** {abnormal,2}