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

[Sharath Ballal]

Ok Gao.  I will open another bug for your case.

 

Thanks,

Sharath

 

 

From: Shuai Gao 
Sent: Friday, February 15, 2019 3:35 PM
To: Sharath Ballal; serviceability-dev at openjdk.java.net
Subject: RE: 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

 

Hello Sharath,

 

Thanks for your reply.

I am afraid the issue in BUG JDK—8219086 is not the same as mine.

In the bug, the output of jhsdb jstack prints some mixed stack trace but does not print all the threads.

Within my issue, the output of jhsdb jstack can print all the threads but can only print the top of the stack trace.

And this issue can always be reproduced on latest Ubuntu (18.04),fedora (29) and RHEL 8 Beta.

On the aforementioned OSs , The pstack can work well with java application. I am afraid there is something about compatibility between JDK and new Linux kernel or ptrace.

 

Best Regards

 

 

 

From: Sharath Ballal 
Sent: 2019年2月15日 17:46
To: Shuai Gao <HYPERLINK "mailto:shuai.gao at oracle.com"shuai.gao at oracle.com>; HYPERLINK "mailto:serviceability-dev at openjdk.java.net"serviceability-dev at openjdk.java.net
Subject: RE: 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

 

Hi Gao,

 

I also observed this failure and opened HYPERLINK "https://bugs.openjdk.java.net/browse/JDK-8219086"JDK-8219086 for it.

 

 

Thanks,

Sharath

 

 

From: Shuai Gao 
Sent: Friday, February 15, 2019 12:15 PM
To: HYPERLINK "mailto:serviceability-dev at openjdk.java.net"serviceability-dev at openjdk.java.net
Subject: 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

 

Hello,

 

I tried “jstack -m PID”in latest openjdk 8 64-bit and “jhsdb jstack –mixed –pid PID” in latest openjdk 11 64-bit on latest Ubuntu(18.04) and latest fedora (29) and RHEL 8 Beta.

The stack traces returned are always incomplete like following output:

 

----------------- 1479 -----------------

"DestroyJavaVM" #17 prio=5 tid=0x0000000000bae000 nid=0x5c7 waiting on condition [0x0000000000000000]

   java.lang.Thread.State: RUNNABLE

   JavaThread state: _thread_blocked

0x00007f839224f9f3  __pthread_cond_wait + 0x243

----------------- 1480 -----------------

----------------- 1481 -----------------

"Reference Handler" #2 daemon prio=10 tid=0x0000000000c36000 nid=0x5c9 waiting on condition [0x00007f8376d15000]

   java.lang.Thread.State: RUNNABLE

   JavaThread state: _thread_blocked

0x00007f839224f9f3  __pthread_cond_wait + 0x243

----------------- 1482 -----------------

"Finalizer" #3 daemon prio=8 tid=0x0000000000c3a000 nid=0x5ca in Object.wait() [0x00007f8376c14000]

   java.lang.Thread.State: WAITING (on object monitor)

   JavaThread state: _thread_blocked

0x00007f839224f9f3  __pthread_cond_wait + 0x243

----------------- 1483 -----------------

"Signal Dispatcher" #4 daemon prio=9 tid=0x0000000000c56800 nid=0x5cb runnable [0x0000000000000000]

   java.lang.Thread.State: RUNNABLE

   JavaThread state: _thread_blocked

0x00007f83922526d6  do_futex_wait.constprop.1 + 0x36

 

The issue existed even after I disable the selinux. It can not be reproduced on oracle linux 7.4.

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.

I can not find any existed bug for now.

 

 

Is there any clue about this issue?

 

Any reply will be appreciated.

 

Best Regards

Gao Shuai from GCS
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