Issues with MaxScale -> Columnstore data export

[MYSQLD]

user=mysql

basedir=/usr/

datadir=/var/lib/mysql

socket=/var/lib/mysql/mysql.sock

pid_file=/var/lib/mysql/mysql.pid

port=3306

log_error=/var/log/mysql/mysqld.log

log_warnings=2

# log_output = FILE

#Slow logging

slow_query_log_file=/var/log/mysql/mysql-slow.log

long_query_time=2

slow_query_log=OFF

log_queries_not_using_indexes=OFF

### INNODB OPTIONS

innodb_buffer_pool_size=248M

innodb_flush_log_at_trx_commit=2

innodb_file_per_table=1

innodb_data_file_path = ibdata1:100M:autoextend

## You may want to tune the below depending on number of cores and disk sub

innodb_read_io_threads=4

innodb_write_io_threads=4

innodb_doublewrite=1

innodb_log_file_size=64M

innodb_log_buffer_size=16M

innodb_buffer_pool_instances=1

innodb_log_files_in_group=2

innodb_thread_concurrency=64

# innodb_file_format = barracuda

innodb_flush_method = O_DIRECT

innodb_rollback_on_timeout=ON

# innodb_locks_unsafe_for_binlog = 1

innodb_autoinc_lock_mode=2

## avoid statistics update when doing e.g show tables

innodb_stats_on_metadata=0

default_storage_engine=innodb

# CHARACTER SET

# collation_server = utf8_unicode_ci

# init_connect = 'SET NAMES utf8'

# character_set_server = utf8

# REPLICATION SPECIFIC

server_id=1

binlog_format=ROW

log_bin=binlog

log_slave_updates=1

relay_log=relay-bin

expire_logs_days=7

read_only=ON

report_host=10.0.0.152

# OTHER THINGS, BUFFERS ETC

key_buffer_size = 24M

tmp_table_size = 64M

max_heap_table_size = 64M

max_allowed_packet = 512M

# sort_buffer_size = 256K

# read_buffer_size = 256K

# read_rnd_buffer_size = 512K

# myisam_sort_buffer_size = 8M

skip_name_resolve

memlock=0

sysdate_is_now=1

max_connections=500

thread_cache_size=512

query_cache_type = 0

query_cache_size = 0

table_open_cache=1024

lower_case_table_names=0

# 5.6 backwards compatibility (FIXME)

# explicit_defaults_for_timestamp = 1

performance_schema = OFF

performance-schema-max-mutex-classes = 0

performance-schema-max-mutex-instances = 0

ignore-db-dir=lost+found

ignore-db-dir=.s9s_do_not_delete

[MYSQL]

socket=/var/lib/mysql/mysql.sock

# default_character_set = utf8

[client]

socket=/var/lib/mysql/mysql.sock

# default_character_set = utf8

[mysqldump]

socket=/var/lib/mysql/mysql.sock

max_allowed_packet = 512M

# default_character_set = utf8

[xtrabackup]

[MYSQLD_SAFE]

# log_error = /var/log/mysqld.log

basedir=/usr/

# datadir = /var/lib/mysql

# The Replication Proxy service

[replication-service]

type=service

router=binlogrouter

server_id=4000

master_id=3000

filestem=binlog

user=maxuser

passwd=maxpwd

# The Avro conversion service

[avro-service]

type=service

router=avrorouter

source=replication-service

filestem=binlog

avrodir=/var/lib/maxscale/avro/

start_index=1

# The listener for the replication-service

[replication-listener]

type=listener

service=replication-service

protocol=MariaDBClient

port=3307

# The client listener for the avro-service

[avro-listener]

type=listener

service=avro-service

protocol=CDC

port=4001

{"type": "record", "namespace": "MaxScaleChangeDataSchema.avro", "fields": [{"type": ["null", "int"], "name": "id", "real_type": "int", "length": 11}, {"type": ["null", "int"], "name": "k", "real_type": "int", "length": 11}, {"type": ["null", "string"], "name": "c", "real_type": "char", "length": 120}, {"type": ["null", "string"], "name": "pad", "real_type": "char", "length": 60}], "name": "ChangeRecord"}

maxadmin call command cdc add_user avro-service coluser colpass

root@vagrant:~# mxs_adapter -u coluser -p colpass -d -a -h 10.0.0.151 -P 4001 -c /var/lib/maxscale/Columnstore.xml sbtest sbtest1

2019-02-20 12:28:54 [main] Started thread 0x2256dc0

2019-02-20 12:28:54 [main] Started 1 threads

2019-02-20 12:28:54 [sbtest.sbtest1] Requesting data for table: sbtest.sbtest1

2019-02-20 12:28:54 [sbtest.sbtest1] MaxScale connection could not be created: Failed to parse JSON: end of file expected near '{'