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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>[BDS-1134] Server appears not to honour max-threads (1.12.0.28)</title>
                <link>https://bugs.mojang.com/browse/BDS-1134</link>
                <project id="11700" key="BDS">Bedrock Dedicated Server</project>
                    <description>&lt;p&gt;This issue affects&#160;1.12.0.28 of bedrock_server&lt;/p&gt;

&lt;p&gt;Despite setting max-threads, bedrock_server still uses 11 threads&lt;/p&gt;</description>
                <environment>lscpu&lt;br/&gt;
Architecture:        x86_64&lt;br/&gt;
CPU op-mode(s):      32-bit, 64-bit&lt;br/&gt;
Byte Order:          Little Endian&lt;br/&gt;
CPU(s):              1&lt;br/&gt;
On-line CPU(s) list: 0&lt;br/&gt;
Thread(s) per core:  1&lt;br/&gt;
Core(s) per socket:  1&lt;br/&gt;
Socket(s):           1&lt;br/&gt;
NUMA node(s):        1&lt;br/&gt;
Vendor ID:           GenuineIntel&lt;br/&gt;
CPU family:          15&lt;br/&gt;
Model:               6&lt;br/&gt;
Model name:          Common KVM processor&lt;br/&gt;
Stepping:            1&lt;br/&gt;
CPU MHz:             1899.999&lt;br/&gt;
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L1d cache:           32K&lt;br/&gt;
L1i cache:           32K&lt;br/&gt;
L2 cache:            4096K&lt;br/&gt;
L3 cache:            16384K&lt;br/&gt;
NUMA node0 CPU(s):   0&lt;br/&gt;
Flags:               fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx lm constant_tsc nopl xtopology cpuid pni cx16 x2apic hypervisor lahf_lm cpuid_fault pti&lt;br/&gt;
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RANGE                                 SIZE  STATE REMOVABLE BLOCK&lt;br/&gt;
0x0000000000000000-0x000000007fffffff   2G online        no  0-15&lt;br/&gt;
&lt;br/&gt;
Memory block size:       128M&lt;br/&gt;
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&lt;br/&gt;
&lt;br/&gt;
lsb_release -a&lt;br/&gt;
No LSB modules are available.&lt;br/&gt;
Distributor ID:	Ubuntu&lt;br/&gt;
Description:	Ubuntu 18.04.2 LTS&lt;br/&gt;
Release:	18.04&lt;br/&gt;
Codename:	bionic&lt;br/&gt;
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        <key id="251054">BDS-1134</key>
            <summary>Server appears not to honour max-threads (1.12.0.28)</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="5">Cannot Reproduce</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="Bytespider">Rob Griffiths</reporter>
                        <labels>
                    </labels>
                <created>Tue, 16 Jul 2019 17:14:57 +0200</created>
                <updated>Sun, 21 Jun 2020 04:59:27 +0200</updated>
                            <resolved>Sun, 21 Jun 2020 04:59:27 +0200</resolved>
                                    <version>1.9.0.15</version>
                                                            <votes>1</votes>
                                    <watches>0</watches>
                                                                            <comments>
                            <comment id="656211" author="bytespider" created="Mon, 30 Mar 2020 18:48:50 +0200"  >&lt;p&gt;Update:&lt;/p&gt;

&lt;p&gt;1 socket, 4 cores, 1 thread. Things do change in terms of initial threads. max-threads=1 or 2 I get 11 threads, 3 gets 12, &amp;gt;=4 13 threads.&lt;/p&gt;

&lt;p&gt;I&apos;m unable to test how it affects gameplay as I only have a low spec tablet with the game currently.&lt;/p&gt;

&lt;p&gt;Perhaps go ahead and close this since I&apos;m the only one affected in over 8 months&lt;/p&gt;</comment>
                            <comment id="656192" author="bytespider" created="Mon, 30 Mar 2020 18:11:55 +0200"  >&lt;p&gt;No, it was still 1 socket 1 core 1 thread but I will test on higher specs and report back.&lt;/p&gt;</comment>
                            <comment id="656191" author="ionicecko" created="Mon, 30 Mar 2020 18:09:28 +0200"  >&lt;p&gt;One last question before I go back and test it, are you still running on a 1 core virtual?&lt;/p&gt;

&lt;p&gt;Like I mentioned I tested it and saw a significant difference in threads when changing that setting so we&#8217;ll likely need to narrow it as much as we can before I can confirm it. &lt;/p&gt;

&lt;p&gt;On first glance (and I&#8217;m on my phone thanks to an internet outage so can&#8217;t really see the screenshots) the only difference I can see is that I would have been running on a 4-6 core ESXi 18.04.3 virtual whereas your environment notes from your initial report have a 1 socket, 1 core, 1 thread virtual.&lt;/p&gt;

&lt;p&gt;I can imagine a scenario where the app won&#8217;t accept a setting that would be deleterious to normal operation, that&#8217;s obviously pure speculation though and completely debunked if your new tests are on a higher spec VM &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;Ionic&lt;/p&gt;
</comment>
                            <comment id="656179" author="bytespider" created="Mon, 30 Mar 2020 17:46:04 +0200"  >&lt;p&gt;You can see in my screenshots that the number of threads did not change.&lt;/p&gt;

&lt;p&gt;I&apos;m pretty convinced this is a bug.&lt;/p&gt;</comment>
                            <comment id="656176" author="ionicecko" created="Mon, 30 Mar 2020 17:43:27 +0200"  >&lt;p&gt;I honestly couldn&apos;t tell you if thats expected or not, I don&apos;t really understand the relationship between how many threads BDS needs to run and what the max-threads option should entail.&lt;/p&gt;

&lt;p&gt;My testing just involved testing it with 1, then upping that number and checking if the number of active threads changed.&lt;/p&gt;

&lt;p&gt;If you know how this stuff should work and you&apos;re confident this is a bug I&apos;m happy to raise it for you.&lt;/p&gt;

&lt;p&gt;Ionic&lt;/p&gt;</comment>
                            <comment id="656048" author="bytespider" created="Mon, 30 Mar 2020 12:40:49 +0200"  >&lt;p&gt;Heres another display of active threads for a process. In this instance, Max Threads was 1. I would expect to see the main process, IO thread, REST thread, Level DB thread MC server thread, and one bedrock_server thread.&lt;/p&gt;

&lt;p&gt;Or am I incorrect?&lt;/p&gt;

&lt;p&gt; &lt;span class=&quot;image-wrap&quot; style=&quot;&quot;&gt;&lt;a id=&quot;277385_thumb&quot; href=&quot;https://bugs.mojang.com/secure/attachment/277385/277385_Screen+Shot+2020-03-30+at+11.39.43.png&quot; title=&quot;Screen Shot 2020-03-30 at 11.39.43.png&quot; file-preview-type=&quot;image&quot; file-preview-id=&quot;277385&quot; file-preview-title=&quot;Screen Shot 2020-03-30 at 11.39.43.png&quot;&gt;&lt;img src=&quot;https://bugs.mojang.com/secure/thumbnail/277385/_thumb_277385.png&quot; style=&quot;border: 0px solid black&quot; role=&quot;presentation&quot;/&gt;&lt;/a&gt;&lt;/span&gt; &lt;/p&gt;</comment>
                            <comment id="656045" author="bytespider" created="Mon, 30 Mar 2020 12:31:14 +0200"  >&lt;p&gt;No, It&apos;s still not fixed, It appears now it spins up 14 treads. &lt;span class=&quot;image-wrap&quot; style=&quot;&quot;&gt;&lt;a id=&quot;277379_thumb&quot; href=&quot;https://bugs.mojang.com/secure/attachment/277379/277379_25+thread+running.png&quot; title=&quot;25 thread running.png&quot; file-preview-type=&quot;image&quot; file-preview-id=&quot;277379&quot; file-preview-title=&quot;25 thread running.png&quot;&gt;&lt;img src=&quot;https://bugs.mojang.com/secure/thumbnail/277379/_thumb_277379.png&quot; style=&quot;border: 0px solid black&quot; role=&quot;presentation&quot;/&gt;&lt;/a&gt;&lt;/span&gt;  &lt;span class=&quot;image-wrap&quot; style=&quot;&quot;&gt;&lt;a id=&quot;277380_thumb&quot; href=&quot;https://bugs.mojang.com/secure/attachment/277380/277380_1+thread+running.png&quot; title=&quot;1 thread running.png&quot; file-preview-type=&quot;image&quot; file-preview-id=&quot;277380&quot; file-preview-title=&quot;1 thread running.png&quot;&gt;&lt;img src=&quot;https://bugs.mojang.com/secure/thumbnail/277380/_thumb_277380.png&quot; style=&quot;border: 0px solid black&quot; role=&quot;presentation&quot;/&gt;&lt;/a&gt;&lt;/span&gt;  &lt;span class=&quot;image-wrap&quot; style=&quot;&quot;&gt;&lt;a id=&quot;277381_thumb&quot; href=&quot;https://bugs.mojang.com/secure/attachment/277381/277381_1+thread.png&quot; title=&quot;1 thread.png&quot; file-preview-type=&quot;image&quot; file-preview-id=&quot;277381&quot; file-preview-title=&quot;1 thread.png&quot;&gt;&lt;img src=&quot;https://bugs.mojang.com/secure/thumbnail/277381/_thumb_277381.png&quot; style=&quot;border: 0px solid black&quot; role=&quot;presentation&quot;/&gt;&lt;/a&gt;&lt;/span&gt;  &lt;span class=&quot;image-wrap&quot; style=&quot;&quot;&gt;&lt;a id=&quot;277382_thumb&quot; href=&quot;https://bugs.mojang.com/secure/attachment/277382/277382_25+thread.png&quot; title=&quot;25 thread.png&quot; file-preview-type=&quot;image&quot; file-preview-id=&quot;277382&quot; file-preview-title=&quot;25 thread.png&quot;&gt;&lt;img src=&quot;https://bugs.mojang.com/secure/thumbnail/277382/_thumb_277382.png&quot; style=&quot;border: 0px solid black&quot; role=&quot;presentation&quot;/&gt;&lt;/a&gt;&lt;/span&gt;  &lt;span class=&quot;image-wrap&quot; style=&quot;&quot;&gt;&lt;a id=&quot;277383_thumb&quot; href=&quot;https://bugs.mojang.com/secure/attachment/277383/277383_4+thread.png&quot; title=&quot;4 thread.png&quot; file-preview-type=&quot;image&quot; file-preview-id=&quot;277383&quot; file-preview-title=&quot;4 thread.png&quot;&gt;&lt;img src=&quot;https://bugs.mojang.com/secure/thumbnail/277383/_thumb_277383.png&quot; style=&quot;border: 0px solid black&quot; role=&quot;presentation&quot;/&gt;&lt;/a&gt;&lt;/span&gt;  &lt;span class=&quot;image-wrap&quot; style=&quot;&quot;&gt;&lt;a id=&quot;277384_thumb&quot; href=&quot;https://bugs.mojang.com/secure/attachment/277384/277384_4+thread+running.png&quot; title=&quot;4 thread running.png&quot; file-preview-type=&quot;image&quot; file-preview-id=&quot;277384&quot; file-preview-title=&quot;4 thread running.png&quot;&gt;&lt;img src=&quot;https://bugs.mojang.com/secure/thumbnail/277384/_thumb_277384.png&quot; style=&quot;border: 0px solid black&quot; role=&quot;presentation&quot;/&gt;&lt;/a&gt;&lt;/span&gt; &lt;/p&gt;</comment>
                            <comment id="655253" author="ionicecko" created="Sat, 28 Mar 2020 15:14:19 +0100"  >&lt;p&gt;I&apos;ve not heard back from you in a while.&lt;/p&gt;

&lt;p&gt;In order to keep the Bedrock Dedicated Server project running smoothly I&apos;m going to request this issue be closed as &lt;b&gt;Awaiting Response&lt;/b&gt;.&lt;/p&gt;

&lt;p&gt;Never fear though! If this is still affecting you in the latest version (and is related to Bedrock Dedicated Server and not the Minecraft Bedrock game) all you have to do is comment and it will reopen.&lt;/p&gt;

&lt;p&gt;If your issue does still exist but is related to the game and not the server software please head over to the &lt;a href=&quot;https://bugs.mojang.com/projects/MCPE/summary&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;Minecraft (Bedrock codebase) project&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;Ionic&lt;/p&gt;

&lt;p&gt;&lt;b&gt;Quick Links&lt;/b&gt;:&lt;br/&gt;
&#128211; &lt;a href=&quot;https://bugs.mojang.com/projects/BDS/summary&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;Issue Guidelines&lt;/a&gt; &amp;#8211; &#128172; &lt;a href=&quot;https://minecrafthopper.net/help/technical-support-resources/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Community Support&lt;/a&gt; &amp;#8211; &#128231; &lt;a href=&quot;https://help.minecraft.net/hc/en-us/requests/new&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Customer Support&lt;/a&gt; &amp;#8211; &#128214; &lt;a href=&quot;https://minecraft.gamepedia.com/Bedrock_Dedicated_Server&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;BDS Wiki&lt;/a&gt; &amp;#8211; &#128214; &lt;a href=&quot;https://help.minecraft.net/hc/en-us/articles/360035131651-Dedicated-Servers-for-Minecraft-on-Bedrock-&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;FAQs&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="642800" author="ionicecko" created="Wed, 4 Mar 2020 14:09:32 +0100"  >&lt;p&gt;Hi Rob,&lt;/p&gt;

&lt;p&gt;Is this still an issue in 1.14.32.1?&lt;/p&gt;

&lt;p&gt;I&apos;ve messed with the max-threads option and it appears to have a significant impact on load distribution for me when generating chunks.&lt;/p&gt;

&lt;p&gt;Ionic&lt;/p&gt;</comment>
                    </comments>
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                            <attachment id="277380" name="1 thread running.png" size="79188" author="Bytespider" created="Mon, 30 Mar 2020 12:30:56 +0200"/>
                            <attachment id="277381" name="1 thread.png" size="72139" author="Bytespider" created="Mon, 30 Mar 2020 12:30:56 +0200"/>
                            <attachment id="277379" name="25 thread running.png" size="79708" author="Bytespider" created="Mon, 30 Mar 2020 12:30:56 +0200"/>
                            <attachment id="277382" name="25 thread.png" size="71609" author="Bytespider" created="Mon, 30 Mar 2020 12:30:56 +0200"/>
                            <attachment id="277384" name="4 thread running.png" size="79040" author="Bytespider" created="Mon, 30 Mar 2020 12:30:56 +0200"/>
                            <attachment id="277383" name="4 thread.png" size="72161" author="Bytespider" created="Mon, 30 Mar 2020 12:30:56 +0200"/>
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                            <attachment id="277385" name="Screen Shot 2020-03-30 at 11.39.43.png" size="69137" author="Bytespider" created="Mon, 30 Mar 2020 12:40:42 +0200"/>
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