"sentRequestQueueLimit reached" message in client logs

Client is in POC phase and they are seeing this below message in their client logs. What does this error mean?

2018-10-25 23:19:40,009 [DEBUG] cb-io-1-4 com.couchbase.client.core.endpoint.AbstractGenericHandler - [] - Rescheduling TouchRequest{observable=rx.subjects.AsyncSubject@32043738, bucket='trade-reporting'} because sentRequestQueueLimit reached.


Seems like a ulimit issue to me on the client side. I requeste ulimit -a output and it is pasted below.

[tomcat@app25 ~]$ hostname; id; ulimit -a

app25.qglnk1.ny2

uid=91(tomcat) gid=91(tomcat) groups=91(tomcat),5019(glnkapps)

core file size          (blocks, -c) 0

data seg size           (kbytes, -d) unlimited

scheduling priority             (-e) 0

file size               (blocks, -f) unlimited

pending signals                 (-i) 63709

max locked memory       (kbytes, -l) unlimited

max memory size         (kbytes, -m) unlimited

open files                      (-n) 1024

pipe size            (512 bytes, -p) 8

POSIX message queues     (bytes, -q) 819200

real-time priority              (-r) 0

stack size              (kbytes, -s) 10240

cpu time               (seconds, -t) unlimited

max user processes              (-u) 1024

virtual memory          (kbytes, -v) unlimited

file locks                      (-x) unlimited

[tomcat@app25 ~]$