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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72" style='text-justify-trim:punctuation'><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hi Gao,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I also observed this failure and opened </span><a href="https://bugs.openjdk.java.net/browse/JDK-8219086">JDK-8219086</a> for it.<span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><p class=MsoNormal align=left style='text-align:left'><span style='font-size:12.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal align=left style='text-align:left'><span style='font-size:12.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Thanks,<o:p></o:p></span></p><p class=MsoNormal align=left style='text-align:left'><span style='font-size:12.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Sharath<o:p></o:p></span></p><p class=MsoNormal align=left style='text-align:left'><span style='font-size:12.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p></div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal align=left style='text-align:left'><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> Shuai Gao <br><b>Sent:</b> Friday, February 15, 2019 12:15 PM<br><b>To:</b> serviceability-dev@openjdk.java.net<br><b>Subject:</b> jstack mixed mode and jhsdb stack mixed mode can not get expected result(stack trace is incomplete) on latest ubuntu or fedora or RHEL 8 beta<o:p></o:p></span></p></div></div><p class=MsoNormal align=left style='text-align:left'><o:p> </o:p></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'>Hello,<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'>I tried <span lang=ZH-CN>“</span>jstack -m PID<span lang=ZH-CN>â€</span>in latest openjdk 8 64-bit and <span lang=ZH-CN>“</span>jhsdb jstack <span lang=ZH-CN>–</span>mixed <span lang=ZH-CN>–</span>pid PID<span lang=ZH-CN>†</span>in latest openjdk 11 64-bit on latest Ubuntu(18.04) and latest fedora (29) and RHEL 8 Beta.<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'>The stack traces returned are always incomplete like following output:<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'>----------------- 1479 -----------------<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'>"DestroyJavaVM" #17 prio=5 tid=0x0000000000bae000 nid=0x5c7 waiting on condition [0x0000000000000000]<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'> java.lang.Thread.State: RUNNABLE<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'> JavaThread state: _thread_blocked<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'>0x00007f839224f9f3 __pthread_cond_wait + 0x243<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'>----------------- 1480 -----------------<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'>----------------- 1481 -----------------<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'>"Reference Handler" #2 daemon prio=10 tid=0x0000000000c36000 nid=0x5c9 waiting on condition [0x00007f8376d15000]<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'> java.lang.Thread.State: RUNNABLE<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'> JavaThread state: _thread_blocked<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'>0x00007f839224f9f3 __pthread_cond_wait + 0x243<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'>----------------- 1482 -----------------<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'>"Finalizer" #3 daemon prio=8 tid=0x0000000000c3a000 nid=0x5ca in Object.wait() [0x00007f8376c14000]<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'> java.lang.Thread.State: WAITING (on object monitor)<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'> JavaThread state: _thread_blocked<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'>0x00007f839224f9f3 __pthread_cond_wait + 0x243<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'>----------------- 1483 -----------------<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'>"Signal Dispatcher" #4 daemon prio=9 tid=0x0000000000c56800 nid=0x5cb runnable [0x0000000000000000]<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'> java.lang.Thread.State: RUNNABLE<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'> JavaThread state: _thread_blocked<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'>0x00007f83922526d6 do_futex_wait.constprop.1 + 0x36<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'>The issue existed even after I disable the selinux. It can not be reproduced on oracle linux 7.4.<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'>The kernel version on Ubuntu or fedora is 4.15. the kernel version on RHEL 8 Beta is 4.18. the kernel version on Oracle linux 7.4 is 3.1.<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'>I can not find any existed bug for now.<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'>Is there any clue about this issue?<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'>Any reply will be appreciated.<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'>Best Regards<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:ZH-CN'>Gao Shuai from GCS<o:p></o:p></span></p></div></body></html>