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[GCS]Use an asynchronous PING to avoid blocking other operations (#9871)

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* Use separate redis client to avoid its sync command blocking other operations

* use redis_failure_detector_client_

* use async command to ping redis

* format log
This commit is contained in:
Tao Wang 2020-08-06 10:10:53 +08:00 • committed by GitHub
parent 12d75784a4
commit 1760586628
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 15 additions and 11 deletions
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21
src/ray/gcs/gcs_server/gcs_redis_failure_detector.cc
View file

@ -16,10 +16,6 @@
#include "ray/common/ray_config.h"
extern "C" {
#include "hiredis/hiredis.h"
}
namespace ray {
namespace gcs {
@ -36,13 +32,18 @@ void GcsRedisFailureDetector::Start() {
}
void GcsRedisFailureDetector::DetectRedis() {
auto *reply = reinterpret_cast<redisReply *>(
redisCommand(redis_context_->sync_context(), "PING"));
if (reply == nullptr || reply->type == REDIS_REPLY_NIL) {
RAY_LOG(ERROR) << "Redis is inactive.";
auto redis_callback = [this](const std::shared_ptr<CallbackReply> &reply) {
if (reply->IsNil()) {
RAY_LOG(ERROR) << "Redis is inactive.";
callback_();
}
};
Status status = redis_context_->RunArgvAsync({"PING"}, redis_callback);
if (!status.ok()) {
RAY_LOG(ERROR) << "Redis is disconnected.";
callback_();
} else {
freeReplyObject(reply);
}
}

5
src/ray/gcs/redis_async_context.cc
View file

@ -75,7 +75,7 @@ Status RedisAsyncContext::RedisAsyncCommand(redisCallbackFn *fn, void *privdata,
// `redisvAsyncCommand` will mutate `redis_async_context_`, use a lock to protect it.
std::lock_guard<std::mutex> lock(mutex_);
if (!redis_async_context_) {
return Status::NotImplemented("...");
return Status::Disconnected("Redis is disconnected");
}
ret_code = redisvAsyncCommand(redis_async_context_, fn, privdata, format, ap);
}
@ -97,6 +97,9 @@ Status RedisAsyncContext::RedisAsyncCommandArgv(redisCallbackFn *fn, void *privd
// `redisAsyncCommandArgv` will mutate `redis_async_context_`, use a lock to protect
// it.
std::lock_guard<std::mutex> lock(mutex_);
if (!redis_async_context_) {
return Status::Disconnected("Redis is disconnected");
}
ret_code =
redisAsyncCommandArgv(redis_async_context_, fn, privdata, argc, argv, argvlen);
}