Comment 0 for bug 1560206

My sequence of events is basically identical to this blog post, because this is directly from CoderShip, I am assuming this is intended to be supported:
http://galeracluster.com/2015/09/support-for-mysql-transaction-isolation-levels-in-galera-cluster/

However, what is being experienced is
1) Data inconsistency, dirty reads are occurring so the record is not being updated properly (lost updates)
2) Connection lockup occurs, where the only way to unlock the client is the restart the DB node(s) for the locked connections.

The server version being used is Percona-XtraDB-Cluster-server-56-5.6.28-25.14.1.el7.x86_64 on CentOS 7.2, it is a 3-node cluster running over a local LAN connected via dual 1Gbps links, with a Linux IPVS load balancer doing round-robin in front from my application.

I have attached a test case that reproduces this issue consistently. This same test case works fine if pointing to only a single DB node in the cluster.

Config settings:

/etc/my.cnf:
[mysqld]
datadir = /var/lib/mysql
# move tmpdir due to /tmp being a memory backed tmpfs filesystem, mysql uses this for on disk sorting
tmpdir = /var/lib/mysql/tmp

[mysqld_safe]
pid-file = /run/mysqld/mysql.pid
syslog
!includedir /etc/my.cnf.d

/etc/my.cnf.d/base.cnf:
[mysqld]
bind-address = 0.0.0.0
key_buffer = 256M
max_allowed_packet = 16M
max_connections = 256
# Some optimizations
thread_concurrency = 10
sort_buffer_size = 2M
query_cache_limit = 100M
query_cache_size = 256M
log_bin
binlog_format = ROW
gtid_mode = ON
log_slave_updates
enforce_gtid_consistency = 1
group_concat_max_len = 102400
innodb_buffer_pool_size = 10G
innodb_log_file_size = 64M
innodb_file_per_table = 1
innodb_file_format = barracuda
default_storage_engine = innodb
# SSD Tuning
innodb_flush_neighbors = 0
innodb_io_capacity = 6000

/etc/my.cnf.d/cluster.cnf:
# Galera cluster
[mysqld]
wsrep_provider = /usr/lib64/libgalera_smm.so
wsrep_sst_method = xtrabackup-v2
wsrep_sst_auth = "sstuser:s3cretPass"
wsrep_cluster_name = cluster
wsrep_slave_threads = 32
wsrep_max_ws_size = 2G
wsrep_provider_options = "gcache.size = 5G; pc.recovery = true"
wsrep_cluster_address = gcomm://10.30.30.11,10.30.30.12,10.30.30.13
wsrep_sync_wait = 0
innodb_autoinc_lock_mode = 2
innodb_locks_unsafe_for_binlog = 1
innodb_flush_log_at_trx_commit = 0
sync_binlog = 0
innodb_support_xa = 0
innodb_flush_method = ALL_O_DIRECT

[sst]
progress = 1
time = 1
streamfmt = xbstream