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    <title>Mojang Studios Jira</title>
    <link>https://bugs.mojang.com</link>
    <description>This file is an XML representation of an issue</description>
    <language>en</language>    <build-info>
        <version>9.12.2</version>
        <build-number>9120002</build-number>
        <build-date>10-01-2024</build-date>
    </build-info>


<item>
            <title>[MC-5245] Exception ticking world: ssp unmodified: slow machine?</title>
                <link>https://bugs.mojang.com/browse/MC-5245</link>
                <project id="10400" key="MC">Minecraft: Java Edition</project>
                    <description>&lt;p&gt;What I expected to happen was:&lt;br/&gt;
New chunks should load as previous to 1.4.6, and I should be able to fly over them in creative mode.&lt;/p&gt;

&lt;p&gt;What happened:&lt;br/&gt;
New chunks were not created, causing the game to crash as I flew.&lt;/p&gt;

&lt;p&gt;Steps to reproduce:&lt;br/&gt;
Graphics FAST&lt;br/&gt;
Render NORMAL&lt;br/&gt;
Smooth lighting OFF&lt;br/&gt;
Anaglyph OFF&lt;br/&gt;
Performance POWER SAVER&lt;br/&gt;
View bobbing OFF&lt;br/&gt;
Advanced OpenGL ON&lt;br/&gt;
Clouds OFF&lt;br/&gt;
Particles MINIMAL&lt;br/&gt;
VSync OFF&lt;/p&gt;

&lt;p&gt;Large biomes, structures on, cheats on&lt;/p&gt;

&lt;p&gt;Stay within 10000m from spawn&lt;br/&gt;
Fly over DESERT&lt;/p&gt;

&lt;p&gt;The world where I noted this to occur was created after version 1.3.&lt;/p&gt;

&lt;p&gt;Additional:&lt;br/&gt;
Due to a moderately slow machine, new chunks sometimes take a long time to load. Since 1.4.6, if this happens while flying, especially over desert terrain, MineCraft may crash entirely if a chunk does not load before entering. I have not ventured more than 10000m from spawn.&lt;/p&gt;

&lt;p&gt;I have not had this issue with previous updates, and have had to significantly downgrade the quality of render to make MineCraft playable on 1.4.6 update for either survival or creative. I have included 2 relevant crash reports.&lt;/p&gt;

&lt;p&gt;Is this a bug, or a glitch due to a slow machine?&lt;/p&gt;</description>
                <environment>Windows 7 Home&lt;br/&gt;
4gb ram, ~2 gHz processor&lt;br/&gt;
Notebook - no additional graphics card noted</environment>
        <key id="17823">MC-5245</key>
            <summary>Exception ticking world: ssp unmodified: slow machine?</summary>
                <type id="1" iconUrl="https://bugs.mojang.com/secure/viewavatar?size=xsmall&amp;avatarId=18903&amp;avatarType=issuetype">Bug</type>
                                    <status id="5" iconUrl="https://bugs.mojang.com/images/icons/statuses/resolved.png" description="A resolution has been taken, and it is awaiting verification by reporter. From here issues are either reopened, or are closed.">Resolved</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="7">Invalid</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="flw84">Jay Ayerson</reporter>
                        <labels>
                    </labels>
                <created>Sun, 23 Dec 2012 04:27:01 +0100</created>
                <updated>Tue, 5 May 2015 12:52:02 +0200</updated>
                            <resolved>Fri, 26 Jul 2013 23:56:39 +0200</resolved>
                                    <version>Minecraft 1.4.6</version>
                    <version>Snapshot 13w02b</version>
                    <version>Snapshot 13w03a</version>
                    <version>Minecraft 1.5</version>
                                                                        <votes>1</votes>
                                    <watches>2</watches>
                                                                            <comments>
                            <comment id="94622" author="bljat" created="Fri, 26 Jul 2013 23:56:39 +0200"  >&lt;p&gt;No more updates, assuming no longer an issue.&lt;/p&gt;</comment>
                            <comment id="91336" author="kumasasa" created="Mon, 15 Jul 2013 07:57:09 +0200"  >&lt;p&gt;Don&apos;t listen to the bot...&lt;/p&gt;</comment>
                            <comment id="91305" author="spamgolem" created="Mon, 15 Jul 2013 04:45:11 +0200"  >&lt;p&gt;I could not find any existing issue that contains any of the crashes mentioned here. However, all of the crash reports that you have provided are from a modded version of Minecraft. Please try to reproduce the crash in a vanilla (non-modded) version of Minecraft and attach that report or this may be dismissed as being caused by a mod. You can view all information known about this specific crash at &lt;a href=&quot;http://dinnerbone.com/mojira/crashes/MCX-224/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;MCX-224&lt;/a&gt;.&lt;/p&gt;</comment>
                            <comment id="65708" author="flw84" created="Fri, 10 May 2013 04:14:06 +0200"  >&lt;p&gt;Don&apos;t know, didn&apos;t test it before I got a much higher powered machine.&lt;/p&gt;</comment>
                            <comment id="65353" author="bljat" created="Tue, 7 May 2013 15:43:45 +0200"  >&lt;p&gt;Is this still a concern in the current Minecraft version? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.&lt;/p&gt;</comment>
                            <comment id="53535" author="bljat" created="Fri, 15 Mar 2013 15:51:19 +0100"  >&lt;p&gt;Note:&lt;/p&gt;
&lt;div class=&quot;code panel&quot; style=&quot;border-width: 1px;&quot;&gt;&lt;div class=&quot;codeContent panelContent&quot;&gt;
&lt;pre class=&quot;code-java&quot;&gt;Description: Exception ticking world
java.util.ConcurrentModificationException
	at java.util.HashMap$HashIterator.nextEntry(Unknown Source)
	at java.util.HashMap$KeyIterator.next(Unknown Source)
	at yp.a(SourceFile:72)
	at in.b(SourceFile:113)&lt;/pre&gt;
&lt;/div&gt;&lt;/div&gt;</comment>
                            <comment id="44093" author="flw84" created="Wed, 6 Feb 2013 23:38:20 +0100"  >&lt;p&gt;Xavier Brown&apos;s advice is good for stability, though it makes the game run slow sometimes. I suspect the max fps setting means the render doesn&apos;t try to cheat on falling blocks - note that I specified desert terrain.&lt;/p&gt;

&lt;p&gt;Thanks to the fact that I have a notebook, the application of an ice pack to the heat exchange is quite effective and means I can render at normal distance safely. However, this is brute-force hacking, rather than an elegant solution.&lt;/p&gt;</comment>
                            <comment id="32147" author="firehunterx" created="Thu, 3 Jan 2013 13:57:19 +0100"  >&lt;p&gt;Try using Max FPS instead of Power Saver. It frequently crashed my game on an older machine.&lt;/p&gt;</comment>
                            <comment id="31203" author="kumasasa" created="Fri, 28 Dec 2012 17:34:13 +0100"  >&lt;p&gt;Not sure if duplicate of &lt;a href=&quot;https://bugs.mojang.com/browse/MC-509&quot; title=&quot;Exception in server tick loop :: ConcurrentModificationException&quot; class=&quot;issue-link&quot; data-issue-key=&quot;MC-509&quot;&gt;&lt;del&gt;MC-509&lt;/del&gt;&lt;/a&gt;, but still related.&lt;/p&gt;</comment>
                            <comment id="30253" author="flw84" created="Sun, 23 Dec 2012 12:19:26 +0100"  >&lt;p&gt;Thanks Kumasasa.&lt;/p&gt;

&lt;p&gt;I did try searching for this. I hope I haven&apos;t wasted your time, as it was not clear from my end (as someone with only modest references to technical programming) that it had any relationship to a previous problem.&lt;/p&gt;</comment>
                            <comment id="30244" author="kumasasa" created="Sun, 23 Dec 2012 10:13:56 +0100"  >&lt;p&gt;This is a duplicate of &lt;a href=&quot;https://bugs.mojang.com/browse/MC-509&quot; title=&quot;Exception in server tick loop :: ConcurrentModificationException&quot; class=&quot;issue-link&quot; data-issue-key=&quot;MC-509&quot;&gt;&lt;del&gt;MC-509&lt;/del&gt;&lt;/a&gt; - which is about dedicated server, but the crash is the same. &lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10102">
                    <name>Duplicate</name>
                                                                <inwardlinks description="is duplicated by">
                                        <issuelink>
            <issuekey id="18083">MC-5467</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="20127">MC-7343</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="20725">MC-7907</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="24215">MC-10273</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="26646">MC-11927</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="12321">MC-1022</issuekey>
        </issuelink>
                            </inwardlinks>
                                    </issuelinktype>
                            <issuelinktype id="10103">
                    <name>Relates</name>
                                            <outwardlinks description="relates to">
                                        <issuelink>
            <issuekey id="11776">MC-509</issuekey>
        </issuelink>
                            </outwardlinks>
                                                        </issuelinktype>
                    </issuelinks>
                <attachments>
                            <attachment id="15950" name="crash-2012-12-23_13.50.09-server.txt" size="2694" author="flw84" created="Sun, 23 Dec 2012 04:27:01 +0100"/>
                            <attachment id="15951" name="crash-2012-12-23_13.53.58-server.txt" size="2850" author="flw84" created="Sun, 23 Dec 2012 04:27:01 +0100"/>
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