{"action":"created","issue":{"url":"https://api.github.com/repos/eclipse/leshan/issues/217","repository_url":"https://api.github.com/repos/eclipse/leshan","labels_url":"https://api.github.com/repos/eclipse/leshan/issues/217/labels{/name}","comments_url":"https://api.github.com/repos/eclipse/leshan/issues/217/comments","events_url":"https://api.github.com/repos/eclipse/leshan/issues/217/events","html_url":"https://github.com/eclipse/leshan/issues/217","id":195040546,"number":217,"title":"Leshan demo deadlock","user":{"login":"jvermillard","id":899073,"avatar_url":"https://avatars.githubusercontent.com/u/899073?v=3","gravatar_id":"","url":"https://api.github.com/users/jvermillard","html_url":"https://github.com/jvermillard","followers_url":"https://api.github.com/users/jvermillard/followers","following_url":"https://api.github.com/users/jvermillard/following{/other_user}","gists_url":"https://api.github.com/users/jvermillard/gists{/gist_id}","starred_url":"https://api.github.com/users/jvermillard/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jvermillard/subscriptions","organizations_url":"https://api.github.com/users/jvermillard/orgs","repos_url":"https://api.github.com/users/jvermillard/repos","events_url":"https://api.github.com/users/jvermillard/events{/privacy}","received_events_url":"https://api.github.com/users/jvermillard/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":2,"created_at":"2016-12-12T17:49:43Z","updated_at":"2016-12-13T16:32:36Z","closed_at":null,"body":"\r\n\r\n\r\nObserved on leshan.eclipse.org, see the attacked thread dump\r\n[jstack.txt](https://github.com/eclipse/leshan/files/646753/jstack.txt)\r\n\r\nMemory dump:\r\n[dump.bin.gz](https://github.com/eclipse/leshan/files/646767/dump.bin.gz)"},"comment":{"url":"https://api.github.com/repos/eclipse/leshan/issues/comments/266787850","html_url":"https://github.com/eclipse/leshan/issues/217#issuecomment-266787850","issue_url":"https://api.github.com/repos/eclipse/leshan/issues/217","id":266787850,"user":{"login":"sbernard31","id":840294,"avatar_url":"https://avatars.githubusercontent.com/u/840294?v=3","gravatar_id":"","url":"https://api.github.com/users/sbernard31","html_url":"https://github.com/sbernard31","followers_url":"https://api.github.com/users/sbernard31/followers","following_url":"https://api.github.com/users/sbernard31/following{/other_user}","gists_url":"https://api.github.com/users/sbernard31/gists{/gist_id}","starred_url":"https://api.github.com/users/sbernard31/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/sbernard31/subscriptions","organizations_url":"https://api.github.com/users/sbernard31/orgs","repos_url":"https://api.github.com/users/sbernard31/repos","events_url":"https://api.github.com/users/sbernard31/events{/privacy}","received_events_url":"https://api.github.com/users/sbernard31/received_events","type":"User","site_admin":false},"created_at":"2016-12-13T16:32:36Z","updated_at":"2016-12-13T16:32:36Z","body":"The issue is probably because we try to acquire writelock as a reader in the `Cleaner`.\r\nThe doc say : [_\"upgrading from a read lock to the write lock is not possible.\"_](https://docs.oracle.com/javase/7/docs/api/java/util/concurrent/locks/ReentrantReadWriteLock.html)\r\n\r\nI fixed it in commit (a2fb1e26208fe90345931c54447af048c0e30e6e)\r\nI also removed the suspect `synchronized` block."}}
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