Magma: Rebalance In is stuck at 14%

guides/gradlew --refresh-dependencies testrunner -P jython=/opt/jython/bin/jython -P 'args=-i /tmp/test_job_magma.ini -p bucket_storage=magma,bucket_eviction_policy=fullEviction,rerun=False -t volumetests.Magma.volume.SystemTestMagma,nodes_init=3,replicas=1,skip_cleanup=True,num_items=500000000,num_buckets=1,bucket_names=GleamBook,doc_size=256,bucket_type=membase,compression_mode=off,iterations=1,batch_size=1000,sdk_timeout=60,log_level=debug,infra_log_level=info,rerun=False,skip_cleanup=True,key_size=18,randomize_doc_size=True,randomize_value=True,assert_crashes_on_load=True,maxttl=60,num_collections=20,doc_ops=expiry,durability=None,fragmentation=20,process_concurrency=2,crashes=10 -m rest'