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alpine network delay when operating HBASE via phoenix
System environment
NAME="Alpine Linux"
ID=alpine
VERSION_ID=3.11.5
PRETTY_NAME="Alpine Linux v3.11"
HOME_URL="https://alpinelinux.org/"
BUG_REPORT_URL="https://bugs.alpinelinux.org/"
~ $ uname -r
3.10.0-1062.18.1.el7.x86_64
~ $ apk list | grep musl
musl-1.1.24-r2 x86_64 {musl} (MIT) [installed]
musl-utils-1.1.24-r2 x86_64 {musl} (MIT BSD GPL2+) [installed]
musl-dev-1.1.24-r2 x86_64 {musl} (MIT) [installed]
~ $Run test script in alpine
~ $ time python test.py
1587781799.9128911
23.95860481262207
33667
0.6693758964538574
351
real 0m 25.33s
user 0m 24.46s
sys 0m 0.47s
~ $ Run test script on CentOS
(base) [root@bigdata-dev03 ~]# cat /etc/os-release
NAME="CentOS Linux"
VERSION="7 (Core)"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="7"
PRETTY_NAME="CentOS Linux 7 (Core)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:7"
HOME_URL="https://www.centos.org/"
BUG_REPORT_URL="https://bugs.centos.org/"
CENTOS_MANTISBT_PROJECT="CentOS-7"
CENTOS_MANTISBT_PROJECT_VERSION="7"
REDHAT_SUPPORT_PRODUCT="centos"
REDHAT_SUPPORT_PRODUCT_VERSION="7"
(base) [root@bigdata-dev03 ~]# uname -r
3.10.0-1062.18.1.el7.x86_64
(base) [root@bigdata-dev03 ~]# time python test.py
1587781936.8903282
2.4388413429260254
33667
0.6046943664550781
351
real 0m3.930s
user 0m3.003s
sys 0m0.244s
(base) [root@bigdata-dev03 ~]# Run the test script in alpine after upgrading the kernel
~ $ cat /etc/os-release
NAME="Alpine Linux"
ID=alpine
VERSION_ID=3.11.5
PRETTY_NAME="Alpine Linux v3.11"
HOME_URL="https://alpinelinux.org/"
BUG_REPORT_URL="https://bugs.alpinelinux.org/"
~ $ uname -r
5.6.7-1.el7.elrepo.x86_64
~ $ time python test.py
1587781294.1356337
10.101239442825317
33667
0.367321252822876
351
real 0m 10.86s
user 0m 10.28s
sys 0m 0.09s
~ $ tcpdump intercepts packets
2273 21.438452 192.168.1.72 172.16.0.199 TCP 7006 [TCP Out-Of-Order] 80 → 33258 [ACK] Seq=7098353 Ack=5443 Win=50304 Len=6940 TSval=991811317 TSecr=979000685
2274 21.438487 192.168.1.72 172.16.0.199 TCP 4230 [TCP Out-Of-Order] 80 → 33258 [ACK] Seq=7105293 Ack=5443 Win=50304 Len=4164 TSval=991811317 TSecr=979000685
2275 21.438632 172.16.0.199 192.168.1.72 TCP 78 [TCP Window Update] 33258 → 80 [ACK] Seq=5443 Ack=7098353 Win=332672 Len=0 TSval=979000685 TSecr=991811316 SLE=7109457 SRE=7116397
2276 21.438701 172.16.0.199 192.168.1.72 TCP 78 [TCP Dup ACK 2270#1] 33258 → 80 [ACK] Seq=5443 Ack=7098353 Win=332672 Len=0 TSval=979000685 TSecr=991811316 SLE=7109457 SRE=7123337I suspect it was caused by musl libc ......