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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>
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<item>
            <title>[MC-2551] When mining stone with a pickaxe, the blocks regenerate without leaving anything to collect</title>
                <link>https://bugs.mojang.com/browse/MC-2551</link>
                <project id="10400" key="MC">Minecraft: Java Edition</project>
                    <description>&lt;p&gt;When i tried to mine stone with a pickaxe the block regenerated in the same place it was, very quickly without leaving any block to pick up. Also the block that I tried to mine would disappear next time i logged on Minecraft&lt;/p&gt;</description>
                <environment>Java version,Windows,Minecraft downloaded</environment>
        <key id="14305">MC-2551</key>
            <summary>When mining stone with a pickaxe, the blocks regenerate without leaving anything to collect</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="starwarboy">Austin Shuck</reporter>
                        <labels>
                    </labels>
                <created>Thu, 8 Nov 2012 22:41:54 +0100</created>
                <updated>Sun, 3 May 2015 06:24:10 +0200</updated>
                            <resolved>Wed, 26 Dec 2012 03:08:42 +0100</resolved>
                                    <version>Minecraft 1.4.2</version>
                                                                        <votes>1</votes>
                                    <watches>2</watches>
                                                                            <comments>
                            <comment id="30814" author="bljat" created="Wed, 26 Dec 2012 03:08:42 +0100"  >&lt;p&gt;Duplicate of &lt;a href=&quot;https://bugs.mojang.com/browse/MC-858&quot; title=&quot;Server lag in singleplayer&quot; class=&quot;issue-link&quot; data-issue-key=&quot;MC-858&quot;&gt;&lt;del&gt;MC-858&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
                            <comment id="24786" author="kumasasa" created="Sun, 25 Nov 2012 11:41:53 +0100"  >&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="21580" author="purple" created="Wed, 14 Nov 2012 23:55:38 +0100"  >&lt;p&gt;I confirm this too (for SSP). It occurs rarely and especially with tools with efficiency 3 or 4. &lt;/p&gt;</comment>
                            <comment id="21573" author="darkderelict" created="Wed, 14 Nov 2012 23:47:23 +0100"  >&lt;p&gt;HA!  I think it might be a little overkill to run the minecraft_server.jar on server class hardware, and have it be the only thing running.  The physical server is running ESX 3.5, and is hosting some other test systems as well.&lt;/p&gt;

&lt;p&gt;I&apos;m only hosting this for my family, so at any given time, there are may be four or five people playing. &lt;img class=&quot;emoticon&quot; src=&quot;https://bugs.mojang.com/images/icons/emoticons/tongue.png&quot; height=&quot;16&quot; width=&quot;16&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/p&gt;

&lt;p&gt;I&apos;m guessing the problem is with my choice of distro.  I&apos;ll give MineOS CRUX a shot, and move the world over to that to see if my experience is the same.&lt;/p&gt;</comment>
                            <comment id="20831" author="kumasasa" created="Mon, 12 Nov 2012 00:05:47 +0100"  >&lt;p&gt;Oh dear. A Java VM inside a Linux VM. The advantage of Java is the independancy from any platform &lt;img class=&quot;emoticon&quot; src=&quot;https://bugs.mojang.com/images/icons/emoticons/wink.png&quot; height=&quot;16&quot; width=&quot;16&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/p&gt;</comment>
                            <comment id="20826" author="darkderelict" created="Sun, 11 Nov 2012 23:59:58 +0100"  >&lt;p&gt;Sorry for the delay.  In my instance it looks like it might be a server side issue.  Looking at the server.log file, it contains the following message when I&apos;m experiencing the issue.&lt;/p&gt;

&lt;p&gt;&lt;span class=&quot;error&quot;&gt;&amp;#91;WARNING&amp;#93;&lt;/span&gt; Can&apos;t keep up! Did the system time change, or is the server overloaded?&lt;/p&gt;

&lt;p&gt;I&apos;m currently running the server.jar file on a VMWare server, running Ubuntu 12.04 Server. I&apos;ve allocated 2048 RAM, two vCPU&apos;s to the virtual server.  The server is running in RAM, and not disk, with 1024M  allocated to the ramdisk.&lt;/p&gt;

&lt;p&gt;Command line:  &quot;java -Xmx2048 -Xms1024 -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalPacing -XX:ParallelGCThreads=2 -XX:+AggressiveOpts -jar minecraft_server.jar nogui&quot;&lt;/p&gt;

&lt;p&gt;And now after looking at the line, it could have something to do with having the max memory equaling the total physical memory allocated to java.  I&apos;ll make an adjustment to the settings to see if anything changes.&lt;/p&gt;

&lt;p&gt;Thanks.&lt;/p&gt;</comment>
                            <comment id="19756" author="darkderelict" created="Fri, 9 Nov 2012 00:25:01 +0100"  >&lt;p&gt;I&apos;ve experienced the same issue.  When mining stone (not sure if other blocks are affected) with a pickaxe, the block regenerates similar to what happens when mining near a spawn point.  I&apos;ll pay more attention to it tonight, since I had originally figured it was just lag from my workstations to the server.&lt;/p&gt;</comment>
                            <comment id="19717" author="kumasasa" created="Thu, 8 Nov 2012 22:46:11 +0100"  >&lt;p&gt;Around protected spawn zone in Multiplayer ?&lt;/p&gt;
</comment>
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                            <issuelinktype id="10102">
                    <name>Duplicate</name>
                                            <outwardlinks description="duplicates">
                                        <issuelink>
            <issuekey id="12138">MC-858</issuekey>
        </issuelink>
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