payload: {"action":"closed","issue":{"url":"https://api.github.com/repos/apache/incubator-doris/issues/1123","repository_url":"https://api.github.com/repos/apache/incubator-doris","labels_url":"https://api.github.com/repos/apache/incubator-doris/issues/1123/labels{/name}","comments_url":"https://api.github.com/repos/apache/incubator-doris/issues/1123/comments","events_url":"https://api.github.com/repos/apache/incubator-doris/issues/1123/events","html_url":"https://github.com/apache/incubator-doris/issues/1123","id":442137883,"node_id":"MDU6SXNzdWU0NDIxMzc4ODM=","number":1123,"title":"BE core dump when ShardedLRUCache::prune ","user":{"login":"kangkaisen","id":9894906,"node_id":"MDQ6VXNlcjk4OTQ5MDY=","avatar_url":"https://avatars0.githubusercontent.com/u/9894906?v=4","gravatar_id":"","url":"https://api.github.com/users/kangkaisen","html_url":"https://github.com/kangkaisen","followers_url":"https://api.github.com/users/kangkaisen/followers","following_url":"https://api.github.com/users/kangkaisen/following{/other_user}","gists_url":"https://api.github.com/users/kangkaisen/gists{/gist_id}","starred_url":"https://api.github.com/users/kangkaisen/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/kangkaisen/subscriptions","organizations_url":"https://api.github.com/users/kangkaisen/orgs","repos_url":"https://api.github.com/users/kangkaisen/repos","events_url":"https://api.github.com/users/kangkaisen/events{/privacy}","received_events_url":"https://api.github.com/users/kangkaisen/received_events","type":"User","site_admin":false},"labels":[{"id":665965626,"node_id":"MDU6TGFiZWw2NjU5NjU2MjY=","url":"https://api.github.com/repos/apache/incubator-doris/labels/bug","name":"bug","color":"ee0701","default":true}],"state":"closed","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":4,"created_at":"2019-05-09T09:25:40Z","updated_at":"2019-09-17T06:48:04Z","closed_at":"2019-09-17T06:48:04Z","author_association":"CONTRIBUTOR","body":"**Describe the bug**\r\n\r\n```\r\n./start_be.sh: line 58: kill: (33824) - No such process\r\nstart time: Mon Apr 29 16:46:45 CST 2019\r\n*** Aborted at 1557391870 (unix time) try \"date -d @1557391870\" if you are using GNU date ***\r\nPC: @           0xd2cdf7 doris::ShardedLRUCache::prune()\r\n*** SIGSEGV (@0x0) received by PID 38777 (TID 0x7f9cd32e4700) from PID 0; stack trace: ***\r\n    @     0x7f9cde7632f0 (unknown)\r\n    @           0xd2cdf7 doris::ShardedLRUCache::prune()\r\n    @           0xc5b75e doris::OLAPEngine::start_clean_fd_cache()\r\n    @           0xc82caf doris::OLAPEngine::_fd_cache_clean_callback()\r\n    @           0xc82d5f _ZNSt6thread11_State_implINS_8_InvokerISt5tupleIJZN5doris10OLAPEngine16_start_bg_workerEvEUlvE4_EEEEE6_M_runEv\r\n    @          0x2526acf execute_native_thread_routine\r\n    @     0x7f9cde518e25 start_thread\r\n    @     0x7f9cde82bbad __clone\r\n\r\n\r\n\r\n(gdb) bt full\r\n#0  0x0000000000d2cdf7 in _lru_remove (e=<optimized out>, this=0x8b143c8) at /home/kangkaisen/palo/be/src/olap/lru_cache.cpp:224\r\nNo locals.\r\n#1  _finish_erase (e=<optimized out>, this=0x8b143c8) at /home/kangkaisen/palo/be/src/olap/lru_cache.cpp:295\r\nNo locals.\r\n#2  prune (this=0x8b143c8) at /home/kangkaisen/palo/be/src/olap/lru_cache.cpp:314\r\n        e = 0x2b63e24d0\r\n        num_prune = 206\r\n#3  doris::ShardedLRUCache::prune (this=0x8b14000) at /home/kangkaisen/palo/be/src/olap/lru_cache.cpp:376\r\n        s = <optimized out>\r\n        num_prune = 2748\r\n#4  0x0000000000c5b75e in doris::OLAPEngine::start_clean_fd_cache (this=this@entry=0x5397c00)\r\n    at /home/kangkaisen/palo/be/src/olap/olap_engine.cpp:1691\r\nNo locals.\r\n#5  0x0000000000c82caf in doris::OLAPEngine::_fd_cache_clean_callback (this=0x5397c00, arg=arg@entry=0x0)\r\n    at /home/kangkaisen/palo/be/src/olap/olap_server.cpp:101\r\n        interval = 3600\r\n```\r\n"}}
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