{"action":"created","issue":{"url":"https://api.github.com/repos/hazelcast/hazelcast/issues/8731","repository_url":"https://api.github.com/repos/hazelcast/hazelcast","labels_url":"https://api.github.com/repos/hazelcast/hazelcast/issues/8731/labels{/name}","comments_url":"https://api.github.com/repos/hazelcast/hazelcast/issues/8731/comments","events_url":"https://api.github.com/repos/hazelcast/hazelcast/issues/8731/events","html_url":"https://github.com/hazelcast/hazelcast/issues/8731","id":171570755,"number":8731,"title":"About Invocation thread, number shown in the log, Invocations, timeouts, backup-timeouts","user":{"login":"alexzhao8898","id":21073336,"avatar_url":"https://avatars.githubusercontent.com/u/21073336?v=3","gravatar_id":"","url":"https://api.github.com/users/alexzhao8898","html_url":"https://github.com/alexzhao8898","followers_url":"https://api.github.com/users/alexzhao8898/followers","following_url":"https://api.github.com/users/alexzhao8898/following{/other_user}","gists_url":"https://api.github.com/users/alexzhao8898/gists{/gist_id}","starred_url":"https://api.github.com/users/alexzhao8898/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/alexzhao8898/subscriptions","organizations_url":"https://api.github.com/users/alexzhao8898/orgs","repos_url":"https://api.github.com/users/alexzhao8898/repos","events_url":"https://api.github.com/users/alexzhao8898/events{/privacy}","received_events_url":"https://api.github.com/users/alexzhao8898/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/hazelcast/hazelcast/labels/Team:%20Core","name":"Team: Core","color":"109def"},{"url":"https://api.github.com/repos/hazelcast/hazelcast/labels/Type:%20Defect","name":"Type: Defect","color":"eb6420"}],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":{"url":"https://api.github.com/repos/hazelcast/hazelcast/milestones/37","html_url":"https://github.com/hazelcast/hazelcast/milestones/Backlog","labels_url":"https://api.github.com/repos/hazelcast/hazelcast/milestones/37/labels","id":531321,"number":37,"title":"Backlog","description":"This milestone is for grouping the issues which we want to consider in the far future","creator":{"login":"gurbuzali","id":1741680,"avatar_url":"https://avatars.githubusercontent.com/u/1741680?v=3","gravatar_id":"","url":"https://api.github.com/users/gurbuzali","html_url":"https://github.com/gurbuzali","followers_url":"https://api.github.com/users/gurbuzali/followers","following_url":"https://api.github.com/users/gurbuzali/following{/other_user}","gists_url":"https://api.github.com/users/gurbuzali/gists{/gist_id}","starred_url":"https://api.github.com/users/gurbuzali/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/gurbuzali/subscriptions","organizations_url":"https://api.github.com/users/gurbuzali/orgs","repos_url":"https://api.github.com/users/gurbuzali/repos","events_url":"https://api.github.com/users/gurbuzali/events{/privacy}","received_events_url":"https://api.github.com/users/gurbuzali/received_events","type":"User","site_admin":false},"open_issues":230,"closed_issues":82,"state":"open","created_at":"2014-01-09T13:44:04Z","updated_at":"2016-08-20T12:53:27Z","due_on":null,"closed_at":null},"comments":3,"created_at":"2016-08-17T04:13:55Z","updated_at":"2016-08-20T13:41:55Z","closed_at":null,"body":"Hi,\r\nI had develop a application about hazalcast. Unluckily, we found that the application will be hanged on about about 4 hours,\r\nI found that something in the log.\r\n2016-08-17 06:28:01,445 DEBUG [OperationService]: {hz._hzInstance_1_dev.InvocationMonitorThread} [1.1.1.4]:5701 [dev] [3.6.4] Invocations:62 timeouts:0 backup-timeouts:0\r\nin every 4 hours, Invocations number is not normal, \r\nin the application, Invocation number is 1 to 0, but after  that time, i,e. it show 62, abnormal start. (some times may hanged, may core dump...)\r\nSo,what is the meaning of those 3 numbers?\r\n"},"comment":{"url":"https://api.github.com/repos/hazelcast/hazelcast/issues/comments/241200773","html_url":"https://github.com/hazelcast/hazelcast/issues/8731#issuecomment-241200773","issue_url":"https://api.github.com/repos/hazelcast/hazelcast/issues/8731","id":241200773,"user":{"login":"jerrinot","id":158619,"avatar_url":"https://avatars.githubusercontent.com/u/158619?v=3","gravatar_id":"","url":"https://api.github.com/users/jerrinot","html_url":"https://github.com/jerrinot","followers_url":"https://api.github.com/users/jerrinot/followers","following_url":"https://api.github.com/users/jerrinot/following{/other_user}","gists_url":"https://api.github.com/users/jerrinot/gists{/gist_id}","starred_url":"https://api.github.com/users/jerrinot/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jerrinot/subscriptions","organizations_url":"https://api.github.com/users/jerrinot/orgs","repos_url":"https://api.github.com/users/jerrinot/repos","events_url":"https://api.github.com/users/jerrinot/events{/privacy}","received_events_url":"https://api.github.com/users/jerrinot/received_events","type":"User","site_admin":false},"created_at":"2016-08-20T13:41:55Z","updated_at":"2016-08-20T13:41:55Z","body":"@alexzhao8898: Invocation is a counter-part of an operation. It's used (among other things) to correlate responses with waiting threads. \r\n\r\nExample: \r\nI have 2 Hazelcast members: MemberA and MemberA. \r\nWhen MemberA wants to access an entry stored in MemberB then it will create an invocation and binds it to a `GetOperation`. The `GetOperation` is sent over the network to `MemberB`. Eventually a response arrives and the invocation is used to find whoever is waiting for the response. \r\n\r\nCan you try your scenario with Hazelcast 3.7? It's a fresh release with tons of internal improvements + MUCH better diagnostics & troubleshooting capabilities. "}}
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