I checked the blobstore is running:

root(a)e83575d2-dfbf-4f7c-97ee-5112560fa137:/var/vcap/sys/log# monit summary
The Monit daemon 5.2.4 uptime: 4h 14m
Process 'consul_agent' running
Process 'metron_agent' running
Process 'blobstore_nginx' running
Process 'route_registrar' running
System 'system_e83575d2-dfbf-4f7c-97ee-5112560fa137' running

But there are thousands of errors saying DopplerForwarder: can't forward message, loggregator client pool is empty:

root(a)e83575d2-dfbf-4f7c-97ee-5112560fa137:/var/vcap/sys/log# find . -name "*.log" | xargs grep -i error | cut -c 73-500 | sort -u
,"process_id":246,"source":"metron","log_level":
"error","message":"DopplerForwarder: can't forward message","data":{
"error":"loggregator client pool is empty"},
"file":"/var/vcap/data/compile/metron_agent/loggregator/src/metron/writers/dopplerforwarder/doppler_forwarder.go",
"line":104,
"method":"metron/writers/dopplerforwarder.(*DopplerForwarder).networkWrite"}

Not sure what is wrong.