{"action":"closed","number":1502,"pull_request":{"url":"https://api.github.com/repos/realm/realm-java/pulls/1502","id":46107611,"html_url":"https://github.com/realm/realm-java/pull/1502","diff_url":"https://github.com/realm/realm-java/pull/1502.diff","patch_url":"https://github.com/realm/realm-java/pull/1502.patch","issue_url":"https://api.github.com/repos/realm/realm-java/issues/1502","number":1502,"state":"closed","locked":false,"title":"Guard globalPathConfigurationCache properly.","user":{"login":"cmelchior","id":406066,"avatar_url":"https://avatars.githubusercontent.com/u/406066?v=3","gravatar_id":"","url":"https://api.github.com/users/cmelchior","html_url":"https://github.com/cmelchior","followers_url":"https://api.github.com/users/cmelchior/followers","following_url":"https://api.github.com/users/cmelchior/following{/other_user}","gists_url":"https://api.github.com/users/cmelchior/gists{/gist_id}","starred_url":"https://api.github.com/users/cmelchior/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/cmelchior/subscriptions","organizations_url":"https://api.github.com/users/cmelchior/orgs","repos_url":"https://api.github.com/users/cmelchior/repos","events_url":"https://api.github.com/users/cmelchior/events{/privacy}","received_events_url":"https://api.github.com/users/cmelchior/received_events","type":"User","site_admin":false},"body":"We had a bug reported against current master:\r\n\r\n```\r\n88    09-26 22:15:09.497 E/ACRA ( 438): ACRA caught a ArrayIndexOutOfBoundsException for com.podfather.podfather\r\n89    09-26 22:15:09.497 E/ACRA ( 438): java.lang.ArrayIndexOutOfBoundsException: length=0; index=0\r\n90    09-26 22:15:09.497 E/ACRA ( 438): at java.util.concurrent.CopyOnWriteArrayList.get(CopyOnWriteArrayList.java:117)\r\n91    09-26 22:15:09.497 E/ACRA ( 438): at io.realm.BaseRealm.validateAgainstExistingConfigurations(BaseRealm.java:482)\r\n92    09-26 22:15:09.497 E/ACRA ( 438): at io.realm.Realm.createAndValidate(Realm.java:276)\r\n93    09-26 22:15:09.497 E/ACRA ( 438): at io.realm.Realm.create(Realm.java:245)\r\n94    09-26 22:15:09.497 E/ACRA ( 438): at io.realm.Realm.getDefaultInstance(Realm.java:200)\r\n95    09-26 22:15:09.497 E/ACRA ( 438): at com.podfather.podfather.services.DataPostService.postPodImages(DataPostService.java:626)\r\n96    09-26 22:15:09.497 E/ACRA ( 438): at com.podfather.podfather.services.DataPostService.onHandleIntent(DataPostService.java:86)\r\n97    09-26 22:15:09.497 E/ACRA ( 438): at android.app.IntentService$ServiceHandler.handleMessage(IntentService.java:65)\r\n98    09-26 22:15:09.497 E/ACRA ( 438): at android.os.Handler.dispatchMessage(Handler.java:102)\r\n99    09-26 22:15:09.497 E/ACRA ( 438): at android.os.Looper.loop(Looper.java:135)\r\n100    09-26 22:15:09.497 E/ACRA ( 438): at android.os.HandlerThread.run(HandlerThread.java:61)\r\n```\r\n\r\nIt could happen because `releaseFileReference` was only synchronized against the instance of a Realm and not the `BaseRealm` class which other methods use when they access `globalPathConfigurationCache`. This can lead to a race condition where `validateAgainstExisitingConfiguration` will wrongly assume it has sole access which is wrong since `releaseFileReference` don't respect the lock on `BaseRealm`.\r\n\r\nThis PR changes the lock from the instance of Realm to the static `BaseRealm` instead.\r\n\r\n@realm/java \r\n\r\n\r\n\r\n","created_at":"2015-09-27T20:02:19Z","updated_at":"2015-10-06T11:42:57Z","closed_at":"2015-10-06T11:42:57Z","merged_at":"2015-10-06T11:42:57Z","merge_commit_sha":"3b216f7c0a22d2aecdd53d5d0447c708e388f935","assignee":{"login":"cmelchior","id":406066,"avatar_url":"https://avatars.githubusercontent.com/u/406066?v=3","gravatar_id":"","url":"https://api.github.com/users/cmelchior","html_url":"https://github.com/cmelchior","followers_url":"https://api.github.com/users/cmelchior/followers","following_url":"https://api.github.com/users/cmelchior/following{/other_user}","gists_url":"https://api.github.com/users/cmelchior/gists{/gist_id}","starred_url":"https://api.github.com/users/cmelchior/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/cmelchior/subscriptions","organizations_url":"https://api.github.com/users/cmelchior/orgs","repos_url":"https://api.github.com/users/cmelchior/repos","events_url":"https://api.github.com/users/cmelchior/events{/privacy}","received_events_url":"https://api.github.com/users/cmelchior/received_events","type":"User","site_admin":false},"milestone":null,"commits_url":"https://api.github.com/repos/realm/realm-java/pulls/1502/commits","review_comments_url":"https://api.github.com/repos/realm/realm-java/pulls/1502/comments","review_comment_url":"https://api.github.com/repos/realm/realm-java/pulls/comments{/number}","comments_url":"https://api.github.com/repos/realm/realm-java/issues/1502/comments","statuses_url":"https://api.github.com/repos/realm/realm-java/statuses/b25af84c1e947d342c85939212bcf79137a37876","head":{"label":"realm:cm-bug-validate-existing-realm","ref":"cm-bug-validate-existing-realm","sha":"b25af84c1e947d342c85939212bcf79137a37876","user":{"login":"realm","id":7575099,"avatar_url":"https://avatars.githubusercontent.com/u/7575099?v=3","gravatar_id":"","url":"https://api.github.com/users/realm","html_url":"https://github.com/realm","followers_url":"https://api.github.com/users/realm/followers","following_url":"https://api.github.com/users/realm/following{/other_user}","gists_url":"https://api.github.com/users/realm/gists{/gist_id}","starred_url":"https://api.github.com/users/realm/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/realm/subscriptions","organizations_url":"https://api.github.com/users/realm/orgs","repos_url":"https://api.github.com/users/realm/repos","events_url":"https://api.github.com/users/realm/events{/privacy}","received_events_url":"https://api.github.com/users/realm/received_events","type":"Organization","site_admin":false},"repo":{"id":4084908,"name":"realm-java","full_name":"realm/realm-java","owner":{"login":"realm","id":7575099,"avatar_url":"https://avatars.githubusercontent.com/u/7575099?v=3","gravatar_id":"","url":"https://api.github.com/users/realm","html_url":"https://github.com/realm","followers_url":"https://api.github.com/users/realm/followers","following_url":"https://api.github.com/users/realm/following{/other_user}","gists_url":"https://api.github.com/users/realm/gists{/gist_id}","starred_url":"https://api.github.com/users/realm/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/realm/subscriptions","organizations_url":"https://api.github.com/users/realm/orgs","repos_url":"https://api.github.com/users/realm/repos","events_url":"https://api.github.com/users/realm/events{/privacy}","received_events_url":"https://api.github.com/users/realm/received_events","type":"Organization","site_admin":false},"private":false,"html_url":"https://github.com/realm/realm-java","description":"Realm 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