{
	"id": "62408",
	"key": "TIMOB-1776",
	"fields": {
		"issuetype": {
			"id": "1",
			"description": "A problem which impairs or prevents the functions of the product.",
			"name": "Bug",
			"subtask": false
		},
		"project": {
			"id": "10153",
			"key": "TIMOB",
			"name": "Titanium SDK/CLI",
			"projectCategory": {
				"id": "10100",
				"description": "Titanium and related SDKs used in application development",
				"name": "Client"
			}
		},
		"fixVersions": [],
		"resolution": {
			"id": "7",
			"description": "",
			"name": "Invalid"
		},
		"resolutiondate": "2012-08-20T16:19:25.000+0000",
		"created": "2011-04-15T03:01:58.000+0000",
		"priority": {
			"name": "Medium",
			"id": "3"
		},
		"labels": [
			"android",
			"concurrentmodificationexception",
			"context",
			"crash",
			"exception",
			"hashmap",
			"synchronization",
			"threading"
		],
		"versions": [],
		"issuelinks": [
			{
				"id": "20047",
				"type": {
					"id": "10003",
					"name": "Relates",
					"inward": "relates to",
					"outward": "relates to"
				},
				"outwardIssue": {
					"id": "94532",
					"key": "TIMOB-9901",
					"fields": {
						"summary": "TiAPI: Review and clean up platform bugs and reduce bug count by 20%.",
						"status": {
							"description": "The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.",
							"name": "Closed",
							"id": "6",
							"statusCategory": {
								"id": 3,
								"key": "done",
								"colorName": "green",
								"name": "Done"
							}
						},
						"priority": {
							"name": "High",
							"id": "2"
						},
						"issuetype": {
							"id": "7",
							"description": "gh.issue.story.desc",
							"name": "Story",
							"subtask": false
						}
					}
				}
			}
		],
		"assignee": {
			"name": "ngupta",
			"key": "ngupta",
			"displayName": "Neeraj Gupta",
			"active": true,
			"timeZone": "America/Los_Angeles"
		},
		"updated": "2017-03-09T23:35:07.000+0000",
		"status": {
			"description": "The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.",
			"name": "Closed",
			"id": "6",
			"statusCategory": {
				"id": 3,
				"key": "done",
				"colorName": "green",
				"name": "Done"
			}
		},
		"components": [
			{
				"id": "10202",
				"name": "Android",
				"description": "Android Platform"
			}
		],
		"description": "{html}<div><p>In StatusNet Mobile we've been working with a lot of event\nlisteners, including Ti.App listeners for communication between our\nprimary context, another context to run XML parsing in the\nbackground, and a WebView used for various data display.</p>\n<p>Sometimes we end up with cases where things quite reliably crash\nthe VM dumping a raw C-level stacktrace that can be worked around\ntemporarily by shuffling when/where we do an addEventListener, but\nI'm also seeing more intermittent bugs where I get a Java-level\nbacktrace like this:</p>\n<pre>\n<code>W/dalvikvm( 1759): threadid=1: thread exiting with uncaught exception (group=0x4001d7f0)\nE/TiUncaughtHandler( 1759): (main) [43,123166] Sending event: exception on thread: main msg:java.lang.RuntimeException: Unable to destroy activity {net.status.client.mobile/org.appcelerator.titanium.TiActivity}: java.util.ConcurrentModificationException\nE/TiUncaughtHandler( 1759): java.lang.RuntimeException: Unable to destroy activity {net.status.client.mobile/org.appcelerator.titanium.TiActivity}: java.util.ConcurrentModificationException\nE/TiUncaughtHandler( 1759):     at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:3655)\nE/TiUncaughtHandler( 1759):     at android.app.ActivityThread.handleDestroyActivity(ActivityThread.java:3673)\nE/TiUncaughtHandler( 1759):     at android.app.ActivityThread.access$2900(ActivityThread.java:125)\nE/TiUncaughtHandler( 1759):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2066)\nE/TiUncaughtHandler( 1759):     at android.os.Handler.dispatchMessage(Handler.java:99)\nE/TiUncaughtHandler( 1759):     at android.os.Looper.loop(Looper.java:123)\nE/TiUncaughtHandler( 1759):     at android.app.ActivityThread.main(ActivityThread.java:4627)\nE/TiUncaughtHandler( 1759):     at java.lang.reflect.Method.invokeNative(Native Method)\nE/TiUncaughtHandler( 1759):     at java.lang.reflect.Method.invoke(Method.java:521)\nE/TiUncaughtHandler( 1759):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)\nE/TiUncaughtHandler( 1759):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)\nE/TiUncaughtHandler( 1759):     at dalvik.system.NativeStart.main(Native Method)\nE/TiUncaughtHandler( 1759): Caused by: java.util.ConcurrentModificationException\nE/TiUncaughtHandler( 1759):     at java.util.HashMap$HashIterator.nextEntry(HashMap.java:795)\nE/TiUncaughtHandler( 1759):     at java.util.HashMap$KeyIterator.next(HashMap.java:822)\nE/TiUncaughtHandler( 1759):     at org.appcelerator.titanium.TiContext.removeEventListenersFromContext(TiContext.java:468)\nE/TiUncaughtHandler( 1759):     at org.appcelerator.titanium.TiProxy.removeEventListenersFromContext(TiProxy.java:242)\nE/TiUncaughtHandler( 1759):     at org.appcelerator.titanium.TiApplication.removeEventListenersFromContext(TiApplication.java:275)\nE/TiUncaughtHandler( 1759):     at org.appcelerator.titanium.TiContext.release(TiContext.java:879)\nE/TiUncaughtHandler( 1759):     at org.appcelerator.titanium.TiActivity.onDestroy(TiActivity.java:415)\nE/TiUncaughtHandler( 1759):     at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:3642)\nE/TiUncaughtHandler( 1759):     ... 11 more</code>\n</pre>\n<p>It looks like there's a lot of unsynchronized access to the\nevent listener hashmaps in TiContext; there's a few\nsynchronized(eventListeners){...} constructs but they're not\nconsistent, and I'm not too sure what does what.</p></div>{html}",
		"attachment": [],
		"flagged": false,
		"summary": "Intermittent ConcurrentModificationException on Android",
		"creator": {
			"name": "brionvibber",
			"key": "brionvibber",
			"displayName": "Brion Vibber",
			"active": true,
			"timeZone": "America/Los_Angeles"
		},
		"subtasks": [],
		"reporter": {
			"name": "brionvibber",
			"key": "brionvibber",
			"displayName": "Brion Vibber",
			"active": true,
			"timeZone": "America/Los_Angeles"
		},
		"environment": null,
		"comment": {
			"comments": [
				{
					"id": "126632",
					"author": {
						"name": "brionvibber",
						"key": "brionvibber",
						"displayName": "Brion Vibber",
						"active": true,
						"timeZone": "America/Los_Angeles"
					},
					"body": "{html}<div><p>I don't have a minimal test case yet, but I was able to decrease\nincidence by switching order of some operations so that a window is\nclosed after, instead of before, starting some background\noperations for account switching.</p>\n<p>Looks like the cleanup of listeners when closing out the\nwindow's activity was conflicting with something else that was\ngetting run...</p></div>{html}",
					"updateAuthor": {
						"name": "brionvibber",
						"key": "brionvibber",
						"displayName": "Brion Vibber",
						"active": true,
						"timeZone": "America/Los_Angeles"
					},
					"created": "2011-04-15T03:01:59.000+0000",
					"updated": "2011-04-15T03:01:59.000+0000"
				},
				{
					"id": "215238",
					"author": {
						"name": "jyounus",
						"key": "jyounus",
						"displayName": "Junaid Younus",
						"active": true,
						"timeZone": "Europe/London"
					},
					"body": "No test case, ticket marked as invalid.",
					"updateAuthor": {
						"name": "jyounus",
						"key": "jyounus",
						"displayName": "Junaid Younus",
						"active": true,
						"timeZone": "Europe/London"
					},
					"created": "2012-08-20T16:19:25.000+0000",
					"updated": "2012-08-20T16:19:25.000+0000"
				},
				{
					"id": "215265",
					"author": {
						"name": "ngupta",
						"key": "ngupta",
						"displayName": "Neeraj Gupta",
						"active": true,
						"timeZone": "America/Los_Angeles"
					},
					"body": "Please reopen this ticket if you can provide a test case or better description to reproduce this issue.",
					"updateAuthor": {
						"name": "ngupta",
						"key": "ngupta",
						"displayName": "Neeraj Gupta",
						"active": true,
						"timeZone": "America/Los_Angeles"
					},
					"created": "2012-08-20T19:29:58.000+0000",
					"updated": "2012-08-20T19:29:58.000+0000"
				},
				{
					"id": "411060",
					"author": {
						"name": "lmorris",
						"key": "lmorris",
						"displayName": "Lee Morris",
						"active": false,
						"timeZone": "America/Los_Angeles"
					},
					"body": "Closing ticket as invalid.",
					"updateAuthor": {
						"name": "lmorris",
						"key": "lmorris",
						"displayName": "Lee Morris",
						"active": false,
						"timeZone": "America/Los_Angeles"
					},
					"created": "2017-03-09T23:35:07.000+0000",
					"updated": "2017-03-09T23:35:07.000+0000"
				}
			],
			"maxResults": 4,
			"total": 4,
			"startAt": 0
		}
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}