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Hi Andrew/Thomas,</div>
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That bug was what I opened for this issue. </div>
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The smartctl version is 6.4. One of our hardware engineers found the command is as below.
<pre style="margin: 0px; padding: 12px; background: rgba(71, 87, 120, 0.08); display: block; overflow: auto; border-radius: 3px; font: 400 11px/15px Menlo, Consolas, Monaco, monospace; text-align: left">ioctl(3, SG_IO, {'S', SG_DXFER_FROM_DEV, cmd[16]=[85, 09, 0e, 00, 00, 00, 40, 00, 03, 00, 00, 00, 00, 00, 2f, 00], mx_sb_len=32, iovec_count=0, dxfer_len=32768, timeout=20000, flags=0, data[32768]=["\1\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...], status=00, masked_status=00, sb[0]=[], host_status=0, driver_status=0, resid=0, duration=5024, info=0}) = 0</pre>
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Xinli </div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>发件人:</b> Andrew Haley <aph@redhat.com><br>
<b>发送时间:</b> 2019年4月26日 1:58<br>
<b>收件人:</b> Thomas Schatzl; shang xinli<br>
<b>抄送:</b> Kim Barrett; shade@redhat.com; hotspot-gc-dev@openjdk.java.net<br>
<b>主题:</b> Re: 回复: 回复: 回复: JVM crashes constantly when High GC happens</font>
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<div class="PlainText">On 4/26/19 7:41 AM, Thomas Schatzl wrote:<br>
> by coincidence I just found a similar recent issue with smartctl in<br>
> the bug tracker: <a href="https://bugs.openjdk.java.net/browse/JDK-8220216">https://bugs.openjdk.java.net/browse/JDK-8220216</a><br>
> <br>
> Same issue here: you run smartctl, and the VM crashes with random<br>
> apparent memory overwrite, in this case modifying some internal object<br>
> metadata too.<br>
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What smartctl command do you use? And what smertctl/kernel versions?<br>
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-- <br>
Andrew Haley<br>
Java Platform Lead Engineer<br>
Red Hat UK Ltd. <<a href="https://www.redhat.com">https://www.redhat.com</a>><br>
EAC8 43EB D3EF DB98 CC77 2FAD A5CD 6035 332F A671<br>
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