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    <language>en</language>    <build-info>
        <version>9.12.2</version>
        <build-number>9120002</build-number>
        <build-date>10-01-2024</build-date>
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<item>
            <title>[MC-1514] Extreme lag/game freeze around lighting glitches</title>
                <link>https://bugs.mojang.com/browse/MC-1514</link>
                <project id="10400" key="MC">Minecraft: Java Edition</project>
                    <description>&lt;p&gt;Primary Problem: Encountered dark spots under mineshafts hanging mid-air in SMP, game appeared to freeze for a few seconds.  Correct shadows would be shown when game resumed.  Vulnerable to hostile mobs while game was &quot;frozen.&quot;&lt;/p&gt;


&lt;p&gt;Full description: I was playing on SMP running a sand flatland world with mineshafts enabled.  Underneath the mineshafts I frequently encountered lighting glitches (dark spots) where many hostile mobs had spawned.  Once I got close enough, the lighting would be updated but this typically caused a near freeze in game performance.  After a few seconds, the game would resume at normal FPS with the correct shadows displayed.  The frustrating part is hostile mobs seemed to be unaffected so that when normal gameplay resumed, I would be surrounded by mobs and already taken a few hits of damage.  Attempting to run away resulted in running into more glitches/more game-freezes and I would die.&lt;/p&gt;</description>
                <environment>OS: Windows Vista 32bit&lt;br/&gt;
CPU: Intel Core2 Duo P8400 (2.26GHz)&lt;br/&gt;
Memory: 4GB&lt;br/&gt;
Graphics: GeForece 9600M GS (1GB)&lt;br/&gt;
Java: build 1.6.0_37-b06 (Java 6 standard edition)</environment>
        <key id="12847">MC-1514</key>
            <summary>Extreme lag/game freeze around lighting glitches</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="3">Duplicate</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="histidine_kinase">Mike Johnson</reporter>
                        <labels>
                            <label>freeze</label>
                            <label>lighting</label>
                            <label>mineshaft</label>
                            <label>multiplayer</label>
                    </labels>
                <created>Wed, 31 Oct 2012 20:34:51 +0100</created>
                <updated>Mon, 4 May 2015 20:51:24 +0200</updated>
                            <resolved>Thu, 1 Nov 2012 16:13:09 +0100</resolved>
                                    <version>Minecraft 1.4.2</version>
                                                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                            <comments>
                            <comment id="16606" author="talven81" created="Thu, 1 Nov 2012 20:57:14 +0100"  >&lt;p&gt;Agreed however these are two symptoms of the same problem. Once they iron out the recoded lighting, to not have a serious impact on low performance machines, it should fix both symptoms.&lt;/p&gt;</comment>
                            <comment id="16602" author="histidine_kinase" created="Thu, 1 Nov 2012 20:53:53 +0100"  >&lt;p&gt;I understand why Talven marked this as a duplicate for the &quot;black lighting&quot; bug but I don&apos;t believe the two should be merged.  The part of this bug that is most detrimental wasn&apos;t the improper rendering of light in the first place, but the extreme lag/game freeze caused by updating the lighting.&lt;/p&gt;</comment>
                            <comment id="16014" author="talven81" created="Wed, 31 Oct 2012 20:39:28 +0100"  >&lt;p&gt;Duplicate of &lt;a href=&quot;https://bugs.mojang.com/browse/MC-1018&quot; title=&quot;Black Lighting under overhangs&quot; class=&quot;issue-link&quot; data-issue-key=&quot;MC-1018&quot;&gt;&lt;del&gt;MC-1018&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;</comment>
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