2.0.1 cpu Usage at near 100% after upgrade from 1.5

@rbrooker wrote:

I’m on a 2 core machine with 4 gigs of memory
I have 11 different configs each on its own systemd process to isolate services.
cpu never went above 30% on 1.5 (default available in the CentOS7 repo)
I built 2.0.1 rpm updated the systemd files and no changes to the configs, now on start the cpu spikes and stays there.

Should I be configuring things differently for 2.0.1? or is this just a bug and I need to install another version/patch

uname -a
Linux proxy0 3.10.0-957.1.3.el7.x86_64 #1 SMP Thu Nov 29 14:49:43 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

HA-Proxy version 2.0.1 2019/06/26 - https://haproxy.org/
Build options :
TARGET = linux-glibc
CPU = generic
CC = gcc
CFLAGS = -O2 -g -fno-strict-aliasing -Wdeclaration-after-statement -fwrapv -Wno-unused-label -Wno-sign-compare -Wno-unused-parameter -Wno-old-style-declaration -Wno-ignored-qualifiers -Wno-clobbered -Wno-missing-field-initializers -Wtype-limits
OPTIONS = USE_PCRE=1 USE_PCRE_JIT=1 USE_THREAD=1 USE_REGPARM=1 USE_LINUX_TPROXY=1 USE_OPENSSL=1 USE_ZLIB=1 USE_TFO=1 USE_NS=1 USE_SYSTEMD=1

Feature list : +EPOLL -KQUEUE -MY_EPOLL -MY_SPLICE +NETFILTER +PCRE +PCRE_JIT -PCRE2 -PCRE2_JIT +POLL -PRIVATE_CACHE +THREAD -PTHREAD_PSHARED +REGPARM -STATIC_PCRE -STATIC_PCRE2 +TPROXY +LINUX_TPROXY +LINUX_SPLICE +LIBCRYPT +CRYPT_H -VSYSCALL +GETADDRINFO +OPENSSL -LUA +FUTEX +ACCEPT4 -MY_ACCEPT4 +ZLIB -SLZ +CPU_AFFINITY +TFO +NS +DL +RT -DEVICEATLAS -51DEGREES -WURFL +SYSTEMD -OBSOLETE_LINKER +PRCTL +THREAD_DUMP -EVPORTS

Default settings :
bufsize = 16384, maxrewrite = 1024, maxpollevents = 200

Built with multi-threading support (MAX_THREADS=64, default=2).
Built with OpenSSL version : OpenSSL 1.0.2k-fips 26 Jan 2017
Running on OpenSSL version : OpenSSL 1.0.2k-fips 26 Jan 2017
OpenSSL library supports TLS extensions : yes
OpenSSL library supports SNI : yes
OpenSSL library supports : SSLv3 TLSv1.0 TLSv1.1 TLSv1.2
Built with network namespace support.
Built with transparent proxy support using: IP_TRANSPARENT IPV6_TRANSPARENT IP_FREEBIND
Built with zlib version : 1.2.7
Running on zlib version : 1.2.7
Compression algorithms supported : identity(“identity”), deflate(“deflate”), raw-deflate(“deflate”), gzip(“gzip”)
Built with PCRE version : 8.32 2012-11-30
Running on PCRE version : 8.32 2012-11-30
PCRE library supports JIT : yes
Encrypted password support via crypt(3): yes

Available polling systems :
epoll : pref=300, test result OK
poll : pref=200, test result OK
select : pref=150, test result OK
Total: 3 (3 usable), will use epoll.

Available multiplexer protocols :
(protocols marked as cannot be specified using ‘proto’ keyword)
h2 : mode=HTX side=FE|BE mux=H2
h2 : mode=HTTP side=FE mux=H2
: mode=HTX side=FE|BE mux=H1
: mode=TCP|HTTP side=FE|BE mux=PASS

Available services : none

Available filters :
[SPOE] spoe
[COMP] compression
[CACHE] cache
[TRACE] trace

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