Date: Sat, 8 Apr 2017 10:03:40 +0300 From: Konstantin Belousov <kostikbel@gmail.com> To: ????????? <redraiment@gmail.com> Cc: freebsd-java@freebsd.org, vangyzen@freebsd.org Subject: Re: OpenJDK8 Thread.sleep will deadlock while turn down system date time. Message-ID: <20170408070340.GD1788@kib.kiev.ua> In-Reply-To: <CAPRzLQSOfySJWqN8CoLNchRs_JgHkeQz57ZNB9E__Meip3zmOQ@mail.gmail.com> References: <CAPRzLQSOfySJWqN8CoLNchRs_JgHkeQz57ZNB9E__Meip3zmOQ@mail.gmail.com>
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On Fri, Apr 07, 2017 at 08:12:42PM -0700, ????????? wrote:
> Hi all,
>
> I found a Java process deadlock issue, and can be reproduced in FreeBSD
> 10.3 and 11.0 .
>
> My environment:
>
> * VirutalBox 5.1.16 r113841 on Mac OS X 10.12.4
> * FreeBSD-11.0-RELEASE-amd64.vhd.xz
>
> Reproduction steps:
>
> 1. install openjdk8
>
> ```sh
> pkg install openjdk8
> ```
>
> 2. Java source code
>
> ```java
> public class Main {
> public static void main(String[] args) {
> while (true) {
> System.out.println("tick");
> Thread.sleep(3000);
> }
> }
> }
> ```
>
> 3. Run java
>
> ```sh
> $ javac Main.java
> $ java Main
> tick
> tick
> ...
> ```
>
> 4. Turn down system date time.
>
> ```sh
> $ date '+%Y-%m-%d %H:%M:%S'
> 20170408 11:09:11
> $ date 201001010000
> Fri Jan 1 00:00:00 CST 2010
> ```
>
> Then, the java process will hung.
Hang != deadlock, why do you claim that the process deadlocked.
>
> The issue will reproduce while turn "DOWN" the date time. It's OK while
> turn up the date time.
If JVM sets timeouts using absolute times than it might be fixed in latest
HEAD and stable/11.
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