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Date: Wed, 5 Jun 2019 08:03:52 +0200 (CEST)
From: Wojciech Puchar <wojtek@puchar.net>
To: freebsd-hackers@freebsd.org
Subject: linux-oracle-jdk18 and futex
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i installed linux-oracle-jdk18

all linux subsytems are active (linux,linux64,linprocfs,linsysfs), 
filesystems mounted

when running tomcat7 using linux-oracle-jdk18 java process consumes 100% 
cpu showing "futex" state constantly.

With openjdk that uses linux emulation problem doesn't exist. with any 
other version of oracje jdk that uses linux emulation - the same problem

FreeBSD puchar.net 11.3-PRERELEASE FreeBSD 11.3-PRERELEASE #0 r347617: Sat 
May 18 19:54:54 CEST 2019 
root@puchar.net:/h/backup1/src/sys/amd64/compile/puchar  amd64

any idea what's wrong?