mojira.dev

Anthony Martin

More than one avatar was detected! There might be multiple accounts sharing this same name.

Assigned

No issues.

Reported

MCPE-79817 I can't type in server chat or write signs Incomplete MC-84842 SMP: RCON Runnable References Incomplete MC-82779 SMP: Failed to save chunk Awaiting Response MC-48489 Players can crash the server if sessions is down. Duplicate MC-46850 Possible Race Condition with RCON Incomplete MC-40250 Key Release Delay When Key Held For Multiple Minutes Fixed MC-12486 Team Colors in server.log Duplicate MC-10584 NPE: Tried to go boating with a boat in a boat while in a boat Duplicate MC-10098 Excessive "lost connection" log messages Duplicate MC-7771 Comparator not updating status after reloading chunks Fixed MC-1217 Enderman glitch death Duplicate MC-1101 Unexplained Lag with Debug Profiling Invalid MC-993 Console Stack Trace :: Invalid argument Fixed MC-933 Ban Duration Parameter Invalid MC-823 Packets generated by third parties can cause heavy lag Duplicate MC-509 Exception in server tick loop :: ConcurrentModificationException Cannot Reproduce MC-271 Buffer Overrun [?] Causes SMP Lock Up Incomplete MC-241 Various events are no longer logged Incomplete MC-48 Nether Ice/Water Works As Intended

Comments

@WitherBoyMCW This is a good workaround for me as well.

I have observed that when the trackpad pointer becomes visible (without the workaround), the game starts to activate OS elements like the Dock. Even closing Minecraft will not fix the issue, once it begins to happen. I have seen full reboots fix the issue temporarily.

I think one thing that can introduce the issue if you haven’t seen it is to watch a video using Picture in Picture while playing Minecraft. When the video is playing, put the iPad to sleep (i.e., close the lid on the Magic Keyboard).

Once you come back, interacting with the video and Minecraft will probably lead to this pointer issue.

I was going to post the same thing, I was expecting cave biomes to be present underground with an overworld biome selected for single biome worlds.

In 1.9.1-pre3, squid appear to no longer spawn in this pattern over the ocean. But in The End, Endermen do at about 133 blocks from the ground.

See capture: http://cl.ly/3P2K2P2M0Y31

I think it fits the criteria of a private issue because new players on SMP can crash the server with minimal time and resources, but its not an instant process.

I also don't think it will actually help prevent maliciousness so there's no real point in marking this issue private.

Confirmed in 15w46a, if you time out at the exact right moment (after the portal takes you out of the overworld and when it says Downloading), you end up at the overworld coordinates when you log back in.

Some players on my server have reached the world border and managed to crash the server by trying to go beyond the world border using this technique.

I encountered this issue today in 15w45a.

Also seem to help, modify server.properties:

network-compression-threshold=-1

Issue this command and the problem happens less:

/gamerule reducedDebugInfo true

I believe it's possibly related to buttons and pressure-plates.

I'm also seeing this happen on my server. No crash report. Just the error message in this issue's description.

I lowered the server view distance from 9 to 3, and it happens even faster.

15w33c:

[13:00:38] [RCON Client #2299/ERROR]: Failed to save chunk
java.util.ConcurrentModificationException
	at java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1207) ~[?:1.8.0_51]
	at java.util.TreeMap$KeyIterator.next(TreeMap.java:1261) ~[?:1.8.0_51]
	at lk.a(SourceFile:574) ~[minecraft_server.jar:?]
	at lk.a(SourceFile:557) ~[minecraft_server.jar:?]
	at aqq.a(SourceFile:244) ~[minecraft_server.jar:?]
	at aqq.a(SourceFile:100) [minecraft_server.jar:?]
	at lj.b(SourceFile:156) [minecraft_server.jar:?]
	at lj.a(SourceFile:200) [minecraft_server.jar:?]
	at lk.a(SourceFile:766) [minecraft_server.jar:?]
	at ay.a(SourceFile:37) [minecraft_server.jar:?]
	at j.a(SourceFile:80) [minecraft_server.jar:?]
	at j.a(SourceFile:63) [minecraft_server.jar:?]
	at kt.a_(SourceFile:558) [minecraft_server.jar:?]
	at mt.run(SourceFile:80) [minecraft_server.jar:?]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_51]

Log:

[20:02:51] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 7125ms behind, skipping 142 tick(s)
[20:02:55] [Server thread/WARN]: There were 13 entity removals pending!
[20:03:03] [Server thread/WARN]: There were 10 entity removals pending!
[20:03:06] [Server thread/WARN]: There were 5 entity removals pending!
[20:03:13] [Server thread/WARN]: There were 11 entity removals pending!
[20:03:15] [Server thread/WARN]: There were 14 entity removals pending!
[20:03:36] [Server thread/WARN]: There were 57 entity removals pending!
[20:03:36] [Server thread/WARN]: There were 4 entity removals pending!
[20:03:36] [Server thread/WARN]: There were 68 entity removals pending!
[20:04:17] [Server thread/WARN]: There were 15 entity removals pending!
[20:04:19] [Server thread/WARN]: There were 21 entity removals pending!
[20:04:28] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 64416ms behind, skipping 1288 tick(s)

Server debug:

---- Minecraft Profiler Results ----
// Speedy. Zoooooom!

Time span: 12250 ms
Tick span: 25 ticks
// This is approximately 2.04 ticks per second. It should be 20 ticks per second

--- BEGIN PROFILE DUMP ---

[00] levels - 87.12%/87.12%
[01]  swim3 - 99.93%/99.93%
[02]   tick - 92.99%/92.99%
[03]    entities - 66.93%/66.93%
[04]     regular - 54.79%/36.70%
[05]      tick - 78.73%/28.90%
[06]       ai - 36.98%/10.69%
[07]        newAi - 98.97%/10.58%
[08]         targetSelector - 80.08%/8.47%
[09]          unspecified - 88.78%/7.52%
[09]          goalSetup - 11.13%/0.94%
[10]           unspecified - 93.19%/0.88%
[10]           canSee - 6.81%/0.06%
[09]          goalTick - 0.08%/0.01%
[08]         goalSelector - 9.34%/0.99%
[09]          goalSetup - 80.33%/0.79%
[10]           pathfind - 83.64%/0.66%
[10]           unspecified - 16.36%/0.13%
[09]          unspecified - 18.26%/0.18%
[09]          goalTick - 1.41%/0.01%
[08]         unspecified - 5.75%/0.61%
[08]         controls - 3.00%/0.32%
[09]          unspecified - 83.68%/0.27%
[09]          look - 7.70%/0.02%
[09]          move - 6.41%/0.02%
[09]          jump - 2.22%/0.01%
[08]         navigation - 0.85%/0.09%
[08]         mob tick - 0.63%/0.07%
[08]         checkDespawn - 0.26%/0.03%
[08]         sensing - 0.10%/0.01%
[07]        unspecified - 1.03%/0.11%
[06]       entityBaseTick - 26.57%/7.68%
[07]        unspecified - 99.87%/7.67%
[07]        portal - 0.13%/0.01%
[06]       push - 24.52%/7.09%
[06]       unspecified - 5.33%/1.54%
[06]       travel - 4.99%/1.44%
[07]        move - 37.68%/0.54%
[07]        rest - 36.11%/0.52%
[07]        unspecified - 26.21%/0.38%
[06]       livingEntityBaseTick - 0.99%/0.29%
[06]       move - 0.19%/0.06%
[06]       rest - 0.11%/0.03%
[06]       mobBaseTick - 0.08%/0.02%
[06]       headTurn - 0.07%/0.02%
[06]       looting - 0.06%/0.02%
[06]       chunkCheck - 0.04%/0.01%
[06]       rangeChecks - 0.03%/0.01%
[06]       jump - 0.02%/0.01%
[06]       portal - 0.00%/0.00%
[05]      unspecified - 21.23%/7.79%
[05]      remove - 0.04%/0.01%
[04]     blockEntities - 45.10%/30.21%
[04]     unspecified - 0.10%/0.07%
[04]     remove - 0.00%/0.00%
[04]     pendingBlockEntities - 0.00%/0.00%
[04]     global - 0.00%/0.00%
[03]    tickBlocks - 23.54%/23.54%
[04]     unspecified - 96.95%/22.84%
[04]     tickBlocks - 1.39%/0.33%
[04]     tickChunk - 0.50%/0.12%
[05]      recheckGaps - 50.08%/0.06%
[06]       unspecified - 75.70%/0.04%
[06]       getBrightness - 22.63%/0.01%
[06]       checkedPosition < toCheckCount - 1.67%/0.00%
[05]      unspecified - 49.92%/0.06%
[04]     getChunk - 0.34%/0.08%
[04]     iceandsnow - 0.29%/0.07%
[04]     checkLight - 0.18%/0.04%
[04]     buildList - 0.14%/0.03%
[04]     thunder - 0.08%/0.02%
[04]     moodSound - 0.07%/0.02%
[04]     playerCheckLight - 0.06%/0.01%
[05]      unspecified - 68.62%/0.01%
[05]      getBrightness - 30.42%/0.00%
[05]      checkedPosition < toCheckCount - 0.96%/0.00%
[03]    tickPending - 8.78%/8.78%
[04]     ticking - 99.77%/8.77%
[05]      unspecified - 93.70%/8.22%
[05]      checkLight - 6.30%/0.55%
[06]       checkedPosition < toCheckCount - 81.68%/0.45%
[06]       getBrightness - 17.03%/0.09%
[06]       unspecified - 1.30%/0.01%
[04]     unspecified - 0.15%/0.01%
[04]     cleaning - 0.08%/0.01%
[03]    mobSpawner - 0.60%/0.60%
[03]    unspecified - 0.13%/0.13%
[03]    chunkSource - 0.01%/0.01%
[03]    chunkMap - 0.01%/0.01%
[03]    village - 0.00%/0.00%
[03]    portalForcer - 0.00%/0.00%
[02]   tracker - 6.92%/6.92%
[02]   unspecified - 0.09%/0.09%
[02]   timeSync - 0.00%/0.00%
[01]  unspecified - 0.07%/0.07%
[00] save - 12.25%/12.25%
[00] jobs - 0.62%/0.62%
[01]  unspecified - 47.04%/0.36%
[01]  travel - 19.34%/0.15%
[02]   move - 39.55%/0.06%
[02]   unspecified - 32.68%/0.05%
[02]   rest - 27.77%/0.04%
[01]  checkLight - 9.59%/0.07%
[02]   checkedPosition < toCheckCount - 77.69%/0.06%
[02]   getBrightness - 20.29%/0.01%
[02]   unspecified - 2.02%/0.00%
[01]  livingEntityBaseTick - 5.52%/0.04%
[01]  entityBaseTick - 4.86%/0.04%
[02]   unspecified - 96.11%/0.04%
[02]   portal - 3.89%/0.00%
[01]  rest - 4.62%/0.04%
[01]  move - 4.43%/0.03%
[01]  push - 2.20%/0.02%
[01]  ai - 1.41%/0.01%
[02]   unspecified - 84.06%/0.01%
[02]   newAi - 15.94%/0.00%
[01]  headTurn - 0.41%/0.00%
[01]  checkedPosition < toCheckCount - 0.21%/0.00%
[01]  getBrightness - 0.20%/0.00%
[01]  rangeChecks - 0.10%/0.00%
[01]  jump - 0.07%/0.00%
[00] connection - 0.01%/0.01%
[01]  unspecified - 95.62%/0.01%
[01]  keepAlive - 4.38%/0.00%
[00] tallying - 0.00%/0.00%
[00] players - 0.00%/0.00%
[00] snooper - 0.00%/0.00%
[00] tickables - 0.00%/0.00%
--- END PROFILE DUMP ---

System Details:

Details:
	Minecraft Version: 15w32c
	Operating System: Mac OS X (x86_64) version 10.9.5
	Java Version: 1.8.0_05, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 2381681512 bytes (2271 MB) / 4225236992 bytes (4029 MB) up to 4225236992 bytes (4029 MB)
	JVM Flags: 5 total; -Xincgc -Xmx4G -XX:+PrintAdaptiveSizePolicy -XX:+PrintGCDetails -Xloggc:server_gc.log

15w32c:

[08:20:03] [RCON Client #61/ERROR]: Failed to save chunk
java.util.ConcurrentModificationException
	at java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1207) ~[?:1.8.0_51]
	at java.util.TreeMap$KeyIterator.next(TreeMap.java:1261) ~[?:1.8.0_51]
	at lg.a(SourceFile:574) ~[minecraft_server.jar:?]
	at lg.a(SourceFile:557) ~[minecraft_server.jar:?]
	at apz.a(SourceFile:241) ~[minecraft_server.jar:?]
	at apz.a(SourceFile:96) [minecraft_server.jar:?]
	at lf.b(SourceFile:161) [minecraft_server.jar:?]
	at lf.a(SourceFile:205) [minecraft_server.jar:?]
	at lg.a(SourceFile:766) [minecraft_server.jar:?]
	at ay.a(SourceFile:37) [minecraft_server.jar:?]
	at j.a(SourceFile:80) [minecraft_server.jar:?]
	at j.a(SourceFile:63) [minecraft_server.jar:?]
	at kp.a_(SourceFile:557) [minecraft_server.jar:?]
	at mp.run(SourceFile:80) [minecraft_server.jar:?]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_51]

Still seeing this problem in 15w32b:

[12:40:47] [RCON Client #3516/ERROR]: Failed to save chunk
java.util.ConcurrentModificationException
  at java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1207) ~[?:1.8.0_51]
  at java.util.TreeMap$KeyIterator.next(TreeMap.java:1261) ~[?:1.8.0_51]
  at lg.a(SourceFile:574) ~[minecraft_server.jar:?]
  at lg.a(SourceFile:557) ~[minecraft_server.jar:?]
  at apz.a(SourceFile:241) ~[minecraft_server.jar:?]
  at apz.a(SourceFile:96) [minecraft_server.jar:?]
  at lf.b(SourceFile:156) [minecraft_server.jar:?]
  at lf.a(SourceFile:200) [minecraft_server.jar:?]
  at lg.a(SourceFile:766) [minecraft_server.jar:?]
  at ay.a(SourceFile:37) [minecraft_server.jar:?]
  at j.a(SourceFile:80) [minecraft_server.jar:?]
  at j.a(SourceFile:63) [minecraft_server.jar:?]
  at kp.a_(SourceFile:557) [minecraft_server.jar:?]
  at mp.run(SourceFile:80) [minecraft_server.jar:?]
  at java.lang.Thread.run(Thread.java:745) [?:1.8.0_51]

Still seeing this problem in 15w32a:

[08:50:01] [RCON Client #135/ERROR]: Failed to save chunk
java.util.ConcurrentModificationException
	at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901) ~[?:1.8.0_51]
	at java.util.ArrayList$Itr.next(ArrayList.java:851) ~[?:1.8.0_51]
	at lg.a(SourceFile:573) ~[minecraft_server.jar:?]
	at lg.a(SourceFile:556) ~[minecraft_server.jar:?]
	at aps.a(SourceFile:241) ~[minecraft_server.jar:?]
	at aps.a(SourceFile:96) [minecraft_server.jar:?]
	at lf.b(SourceFile:156) [minecraft_server.jar:?]
	at lf.a(SourceFile:200) [minecraft_server.jar:?]
	at lg.a(SourceFile:765) [minecraft_server.jar:?]
	at ay.a(SourceFile:37) [minecraft_server.jar:?]
	at j.a(SourceFile:80) [minecraft_server.jar:?]
	at j.a(SourceFile:63) [minecraft_server.jar:?]
	at kp.a_(SourceFile:557) [minecraft_server.jar:?]
	at mp.run(SourceFile:80) [minecraft_server.jar:?]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_51]

I'm attaching Plumbr reports taken while running 15w31c for many hours.

These "failed to save chunk" messages seem to correlate with high memory usage.

Still seeing this problem in 15w31c:

[11:51:03] [RCON Client #1763/ERROR]: Failed to save chunk
java.util.ConcurrentModificationException
	at java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1207) ~[?:1.8.0_51]
	at java.util.TreeMap$KeyIterator.next(TreeMap.java:1261) ~[?:1.8.0_51]
	at lg.a(SourceFile:572) ~[minecraft_server.jar:?]
	at lg.a(SourceFile:555) ~[minecraft_server.jar:?]
	at aow.a(SourceFile:240) ~[minecraft_server.jar:?]
	at aow.a(SourceFile:95) [minecraft_server.jar:?]
	at lf.b(SourceFile:156) [minecraft_server.jar:?]
	at lf.a(SourceFile:200) [minecraft_server.jar:?]
	at lg.a(SourceFile:764) [minecraft_server.jar:?]
	at ay.a(SourceFile:37) [minecraft_server.jar:?]
	at j.a(SourceFile:80) [minecraft_server.jar:?]
	at j.a(SourceFile:63) [minecraft_server.jar:?]
	at kp.a_(SourceFile:557) [minecraft_server.jar:?]
	at mp.run(SourceFile:80) [minecraft_server.jar:?]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_51]
[11:51:03] [RCON Client #1763/ERROR]: Failed to save chunk
java.util.ConcurrentModificationException
	at java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1207) ~[?:1.8.0_51]
	at java.util.TreeMap$KeyIterator.next(TreeMap.java:1261) ~[?:1.8.0_51]
	at lg.a(SourceFile:572) ~[minecraft_server.jar:?]
	at lg.a(SourceFile:555) ~[minecraft_server.jar:?]
	at aow.a(SourceFile:240) ~[minecraft_server.jar:?]
	at aow.a(SourceFile:95) [minecraft_server.jar:?]
	at lf.b(SourceFile:156) [minecraft_server.jar:?]
	at lf.a(SourceFile:200) [minecraft_server.jar:?]
	at lg.a(SourceFile:764) [minecraft_server.jar:?]
	at ay.a(SourceFile:37) [minecraft_server.jar:?]
	at j.a(SourceFile:80) [minecraft_server.jar:?]
	at j.a(SourceFile:63) [minecraft_server.jar:?]
	at kp.a_(SourceFile:557) [minecraft_server.jar:?]
	at mp.run(SourceFile:80) [minecraft_server.jar:?]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_51]
[11:51:04] [RCON Client #1763/ERROR]: Failed to save chunk
java.util.ConcurrentModificationException
	at java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1207) ~[?:1.8.0_51]
	at java.util.TreeMap$KeyIterator.next(TreeMap.java:1261) ~[?:1.8.0_51]
	at lg.a(SourceFile:572) ~[minecraft_server.jar:?]
	at lg.a(SourceFile:555) ~[minecraft_server.jar:?]
	at aow.a(SourceFile:240) ~[minecraft_server.jar:?]
	at aow.a(SourceFile:95) [minecraft_server.jar:?]
	at lf.b(SourceFile:156) [minecraft_server.jar:?]
	at lf.a(SourceFile:200) [minecraft_server.jar:?]
	at lg.a(SourceFile:764) [minecraft_server.jar:?]
	at ay.a(SourceFile:37) [minecraft_server.jar:?]
	at j.a(SourceFile:80) [minecraft_server.jar:?]
	at j.a(SourceFile:63) [minecraft_server.jar:?]
	at kp.a_(SourceFile:557) [minecraft_server.jar:?]
	at mp.run(SourceFile:80) [minecraft_server.jar:?]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_51]
[11:51:04] [RCON Client #1763/ERROR]: Failed to save chunk
java.util.ConcurrentModificationException
	at java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1207) ~[?:1.8.0_51]
	at java.util.TreeMap$KeyIterator.next(TreeMap.java:1261) ~[?:1.8.0_51]
	at lg.a(SourceFile:572) ~[minecraft_server.jar:?]
	at lg.a(SourceFile:555) ~[minecraft_server.jar:?]
	at aow.a(SourceFile:240) ~[minecraft_server.jar:?]
	at aow.a(SourceFile:95) [minecraft_server.jar:?]
	at lf.b(SourceFile:156) [minecraft_server.jar:?]
	at lf.a(SourceFile:200) [minecraft_server.jar:?]
	at lg.a(SourceFile:764) [minecraft_server.jar:?]
	at ay.a(SourceFile:37) [minecraft_server.jar:?]
	at j.a(SourceFile:80) [minecraft_server.jar:?]
	at j.a(SourceFile:63) [minecraft_server.jar:?]
	at kp.a_(SourceFile:557) [minecraft_server.jar:?]
	at mp.run(SourceFile:80) [minecraft_server.jar:?]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_51]
[11:51:04] [RCON Client #1763/ERROR]: Failed to save chunk
java.util.ConcurrentModificationException
	at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901) ~[?:1.8.0_51]
	at java.util.ArrayList$Itr.next(ArrayList.java:851) ~[?:1.8.0_51]
	at lg.a(SourceFile:572) ~[minecraft_server.jar:?]
	at lg.a(SourceFile:555) ~[minecraft_server.jar:?]
	at aow.a(SourceFile:240) ~[minecraft_server.jar:?]
	at aow.a(SourceFile:95) [minecraft_server.jar:?]
	at lf.b(SourceFile:156) [minecraft_server.jar:?]
	at lf.a(SourceFile:200) [minecraft_server.jar:?]
	at lg.a(SourceFile:764) [minecraft_server.jar:?]
	at ay.a(SourceFile:37) [minecraft_server.jar:?]
	at j.a(SourceFile:80) [minecraft_server.jar:?]
	at j.a(SourceFile:63) [minecraft_server.jar:?]
	at kp.a_(SourceFile:557) [minecraft_server.jar:?]
	at mp.run(SourceFile:80) [minecraft_server.jar:?]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_51]

Sorry, I couldn't be sure that the preview was working correctly because slash it problematic in JSON (which is what these previews typically use to communicate with AJAX).

I suspect maybe it has to do with characters that are problematic in JSON like slash (\\\\) and quotes (").