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[core] Support configurable number of "check for redis" attempts (#11902)

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Signed-off-by: Richard Liaw <rliaw@berkeley.edu>
This commit is contained in:
Richard Liaw
2020-11-10 14:57:57 -08:00
committed by GitHub
parent 1d158dda32
commit 50dbf1a307
2 changed files with 12 additions and 4 deletions
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python/ray/_private/services.py
+8 -4
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@@ -551,7 +551,7 @@ def wait_for_redis_to_start(redis_ip_address, redis_port, password=None):
redis_client = redis.StrictRedis(
host=redis_ip_address, port=redis_port, password=password)
# Wait for the Redis server to start.
num_retries = 12
num_retries = ray_constants.START_REDIS_WAIT_RETRIES
delay = 0.001
for _ in range(num_retries):
try:
@@ -567,9 +567,13 @@ def wait_for_redis_to_start(redis_ip_address, redis_port, password=None):
else:
break
else:
raise RuntimeError("Unable to connect to Redis. If the Redis instance "
"is on a different machine, check that your "
"firewall is configured properly.")
raise RuntimeError(
f"Unable to connect to Redis (after {num_retries} retries). "
"If the Redis instance is on a different machine, check that "
"your firewall and relevant Ray ports are configured properly. "
"You can also set the environment variable "
"`RAY_START_REDIS_WAIT_RETRIES` to increase the number of "
"attempts to ping the Redis server.")
def _compute_version_info():