PXC-8.0 xtrabackup SST is failing with OS errno 32 - Broken pipe

1) Initialize PXC-5.7 data directories 

./pxc57/bin/mysqld --no-defaults --initialize-insecure --datadir=/dev/shm/qa/node1 --basedir=/dev/shm/qa/pxc57
./pxc57/bin/mysqld --no-defaults --initialize-insecure --datadir=/dev/shm/qa/node2 --basedir=/dev/shm/qa/pxc57

2) start cluster 

./pxc57/bin/mysqld --defaults-file=/dev/shm/qa/pxc57_n1.cnf --wsrep-new-cluster &
./pxc57/bin/mysqld --defaults-file=/dev/shm/qa/pxc57_n2.cnf &

3) Initiate sysbench load

mysql  -A -uroot -S/dev/shm/qa/node1/socket.sock -e "create user [email protected]'%' identified with  mysql_native_password by 'test';"
mysql  -A -uroot -S/dev/shm/qa/node1/socket.sock -e "grant all on *.* to [email protected]'%';"
mysql  -A -uroot -S/dev/shm/qa/node1/socket.sock -e "drop database if exists sbtest;create database sbtest"


sysbench /usr/share/sysbench/oltp_insert.lua --mysql-db=sbtest --mysql-user=sysbench --mysql-password=test --db-driver=mysql --mysql-socket=/dev/shm/qa/node1/socket.sock --threads=10 --tables=10 --table-size=1000 prepare

sysbench /usr/share/sysbench/oltp_read_write.lua --mysql-db=sbtest --mysql-user=sysbench --mysql-password=test --db-driver=mysql --mysql-socket=/dev/shm/qa/node1/socket.sock --threads=10 --tables=10 --time=3000 --report-interval=10 run

sleep 60

4) shutdown node2 for upgrade

/dev/shm/qa/pxc57/bin/mysqladmin -uroot -S/dev/shm/qa/node2/socket.sock shutdown

sleep 150

5) kill sysbench run

# start node2 with PXC-8.0 binary

./pxc80/bin/mysqld --defaults-file=/dev/shm/qa/pxc80_n2.cnf &

6) Check error log

# If above steps are not reproduced the issue, please follow these steps too to reproduce the issue.

1) shutdown cluster
/dev/shm/qa/pxc80/bin/mysqladmin -uroot -S/dev/shm/qa/node2/socket.sock shutdown
/dev/shm/qa/pxc80/bin/mysqladmin -uroot -S/dev/shm/qa/node1/socket.sock shutdown

2) start node1 with PXC-8.0 binary

./pxc80/bin/mysqld --defaults-file=/dev/shm/qa/pxc80_n1.cnf --wsrep-new-cluster &

3) initiate sysbench 

sysbench /usr/share/sysbench/oltp_read_write.lua --mysql-db=sbtest --mysql-user=sysbench --mysql-password=test --db-driver=mysql --mysql-socket=/dev/shm/qa/node1/socket.sock --threads=10 --tables=10 --time=3000 --report-interval=10 run

4) kill sysbench after 60 sec

5) start node2

./pxc80/bin/mysqld --defaults-file=/dev/shm/qa/pxc80_n2.cnf &