OceanBase 数据库 V4.x 版本集群在开启全链路诊断时，因全链路信息获取出现 -4018 导致会话被强制断的原因和解决方法

000ORA-00600: internal error code, arguments: -4018, Entry not exist

observer.log.20240807105634024:[2024-08-07 10:54:41.734692] WDIAG [SERVER] resolve_flt_span_rec (ob_flt_utils.cpp:575) [1290377][T1006_L0_G0][T1006][xxxxx-xxxxx-xxxxx-xxxxx] [lt=11][errcode=-4018] failed to record request info in request manager(ret=-4018)
observer.log.20240807105634024:[2024-08-07 10:54:41.734706] WDIAG [SERVER] process_flt_span_rec (ob_flt_utils.cpp:524) [1290377][T1006_L0_G0][T1006][xxxxx-xxxxx-xxxxx-xxxxx] [lt=13][errcode=-4018] fail to resolve array child dom(ret=-4018)
observer.log.20240807105634024:[2024-08-07 10:54:41.734719] WDIAG [SERVER] process_flt_extra_info (ob_flt_utils.cpp:322) [1290377][T1006_L0_G0][T1006][xxxxx-xxxxx-xxxxx-xxxxx] [lt=10][errcode=-4018] failed to generate flt span record from string(ret=-4018)
observer.log.20240807105634024:[2024-08-07 10:54:41.734726] WDIAG [SERVER] init_flt_info (ob_flt_utils.cpp:96) [1290377][T1006_L0_G0][T1006][xxxxx-xxxxx-xxxxx-xxxxx] [lt=7][errcode=-4018] fail to exec process_flt_extra_info(extra_info.get_full_link_trace().ptr(), extra_info.get_full_link_trace().length(), session)(ret=-4018)
observer.log.20240807105634024:[2024-08-07 10:54:41.734734] WDIAG [SERVER] process (obmp_query.cpp:198) [1290377][T1006_L0_G0][T1006][xxxxx-xxxxx-xxxxx-xxxxx] [lt=8][errcode=-4018] failed to update flt extra info(ret=-4018)
observer.log.20240807105634024:[2024-08-07 10:54:41.734755] INFO  [SERVER] send_error_packet (obmp_packet_sender.cpp:319) [1290377][T1006_L0_G0][T1006][xxxxx-xxxxx-xxxxx-xxxxx] [lt=9] sending error packet(ob_error=-4018, client error=600, extra_err_info=NULL, lbt()="0x1369dc2c 0xab938d0 0xab42f74 0x54d1654 0x54c565a 0x54af0b4 0xa84e944 0x13958950 0x7f90eb011f1b 0x7f90eaf491c0")
observer.log.20240807105634024:[2024-08-07 10:54:41.734788] INFO  [SERVER] send_error_packet (obmp_packet_sender.cpp:502) [1290377][T1006_L0_G0][T1006][xxxxx-xxxxx-xxxxx-xxxxx] [lt=12] dump txn free route audit_record(value=1048581, session->get_sessid()=3221775045, session->get_proxy_sessid()=738646044803568051)
observer.log.20240807105634024:[2024-08-07 10:54:41.734801] WDIAG [SERVER] force_disconnect (obmp_packet_sender.cpp:774) [1290377][T1006_L0_G0][T1006][xxxxx-xxxxx-xxxxx-xxxxx] [lt=8][errcode=-4000] force disconnect(lbt()="0x1369dc2c 0xab96e51 0xab629f8 0x54d365e 0x54c565a 0x54af0b4 0xa84e944 0x13958950 0x7f90eb011f1b 0x7f90eaf491c0")
observer.log.20240807105634024:[2024-08-07 10:54:41.734812] WDIAG [SERVER] disconnect (obmp_packet_sender.cpp:788) [1290377][T1006_L0_G0][T1006][xxxxx-xxxxx-xxxxx-xxxxx] [lt=8][errcode=0] server close connection(sessid=3221775045, proxy_sessid=738646044803568051, stack="0x1369dc2c 0xab96fd2 0xab627cd 0xab62a00 0x54d365e 0x54c565a 0x54af0b4 0xa84e944 0x13958950 0x7f90eb011f1b 0x7f90eaf491c0")
observer.log.20240807105634024:[2024-08-07 10:54:41.734823] WDIAG [SERVER] process (obmp_query.cpp:385) [1290377][T1006_L0_G0][T1006][xxxxx-xxxxx-xxxxx-xxxxx] [lt=9][errcode=-4018] disconnect connection(ret=-4018, ret="OB_ENTRY_NOT_EXIST")

observer.log.20240807105634024:[2024-08-07 10:54:41.734692] WDIAG [SERVER] resolve_flt_span_rec (ob_flt_utils.cpp:575) [1290377][T1006_L0_G0][T1006][xxxxx-xxxxx-xxxxx-xxxxx] [lt=11][errcode=-4018] failed to record request info in request manager(ret=-4018)
observer.log.20240807105634024:[2024-08-07 10:54:41.734734] WDIAG [SERVER] process (obmp_query.cpp:198) [1290377][T1006_L0_G0][T1006][xxxxx-xxxxx-xxxxx-xxxxx] [lt=8][errcode=-4018] failed to update flt extra info(ret=-4018)