{"action":"closed","issue":{"url":"https://api.github.com/repos/ReactiveX/RxJava/issues/3749","repository_url":"https://api.github.com/repos/ReactiveX/RxJava","labels_url":"https://api.github.com/repos/ReactiveX/RxJava/issues/3749/labels{/name}","comments_url":"https://api.github.com/repos/ReactiveX/RxJava/issues/3749/comments","events_url":"https://api.github.com/repos/ReactiveX/RxJava/issues/3749/events","html_url":"https://github.com/ReactiveX/RxJava/issues/3749","id":140286342,"number":3749,"title":"ConcurrentModificationException in RxJavaPlugins.getPluginImplementationViaProperty","user":{"login":"niqo01","id":1121251,"avatar_url":"https://avatars.githubusercontent.com/u/1121251?v=3","gravatar_id":"","url":"https://api.github.com/users/niqo01","html_url":"https://github.com/niqo01","followers_url":"https://api.github.com/users/niqo01/followers","following_url":"https://api.github.com/users/niqo01/following{/other_user}","gists_url":"https://api.github.com/users/niqo01/gists{/gist_id}","starred_url":"https://api.github.com/users/niqo01/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/niqo01/subscriptions","organizations_url":"https://api.github.com/users/niqo01/orgs","repos_url":"https://api.github.com/users/niqo01/repos","events_url":"https://api.github.com/users/niqo01/events{/privacy}","received_events_url":"https://api.github.com/users/niqo01/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/ReactiveX/RxJava/labels/PR%20welcome","name":"PR welcome","color":"e0e000"},{"url":"https://api.github.com/repos/ReactiveX/RxJava/labels/Question","name":"Question","color":"cc317c"}],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":6,"created_at":"2016-03-11T20:40:23Z","updated_at":"2016-04-14T18:09:37Z","closed_at":"2016-04-14T18:09:37Z","body":"I am using RxJava 1.1.1 on Android and getting the following error:\r\n```java\r\nCaused by java.util.ConcurrentModificationException\r\n       at java.util.Hashtable$HashIterator.nextEntry(Hashtable.java:727)\r\n       at java.util.Hashtable$EntryIterator.next(Hashtable.java:778)\r\n       at java.util.Hashtable$EntryIterator.next(Hashtable.java:776)\r\n       at rx.plugins.RxJavaPlugins.getPluginImplementationViaProperty(RxJavaPlugins.java:177)\r\n       at rx.plugins.RxJavaPlugins.getSchedulersHook(RxJavaPlugins.java:232)\r\n       at rx.schedulers.Schedulers.(Schedulers.java)\r\n       at rx.schedulers.Schedulers.(Schedulers.java)\r\n```\r\n\r\nMy code is \r\n\r\n```java\r\nunreadConversationsServer = unreadConversations;\r\n      final Scheduler.Worker worker = Schedulers.io().createWorker();\r\n      worker.schedule(() -> {\r\n        try {\r\n          computeUnreadUnSyncedConversationCount();\r\n        } catch (Exception e) {\r\n          Timber.e(e, \"Error while computing Unread Unsynced Conversation Count\");\r\n        }\r\n        worker.unsubscribe();\r\n      });\r\n```\r\nFull detail here: http://crashes.to/s/4ecb8083b7f"}}