Protocol error while publishing on Redis using hiredis - redis

Question

Problem Description
I am using hiredis unix socket to publish a number of messages (~2 KB per second) on a RPI 4B. I use the code given below to publish. I start getting Redis Protocol error messages after approximately 30-45 minutes of operation. Please let me know I can resolve this. Thank you!
`
#include "RedisDriver.h"
static redisContext* context;
const char* REDIS_SERVER_UNIX_SOCKET = (const char*) "/var/run/redis/redis-server.sock";
const char* REDIS_PACKET_CHANNEL_NAME = (const char*) "App-Data";
const char* REDIS_STATS_CHANNEL_NAME = (const char*) "App-Stats";
int RedisDriver_Initialize() {
struct timeval timeout = { 1, 500000 }; // 1.5 seconds
context = redisConnectUnixWithTimeout(REDIS_SERVER_UNIX_SOCKET, timeout);
if (context == NULL || context->err) {
if (context) {
syslog(LOG_ERR, "REDIS connection error: %s", context->errstr);
redisFree(context);
} else {
syslog(LOG_ERR,"Unable to allocate REDIS context.");
}
return FAILURE;
}
syslog(LOG_INFO, "Connected to REDIS at %s", REDIS_SERVER_UNIX_SOCKET);
return SUCCESS;
}
int RedisDriver_Publish(char* msg, const char* channel_name) {
if (!msg || !channel_name) {
return FAILURE;
}
//syslog(LOG_DEBUG, "message to publish: %s", msg);
redisReply* reply = (redisReply*) redisCommand(context, "PUBLISH %s %s", channel_name, msg);
if (reply) {
syslog(LOG_INFO, "Published %s. Reply: %s", channel_name, reply->str);
freeReplyObject(reply);
return SUCCESS;
}
switch(context->err) {
case REDIS_ERR_IO:
syslog(LOG_ERR, "There was an I/O error while connecting to REDIS.");
break;
case REDIS_ERR_EOF:
syslog(LOG_ERR, "REDIS server closed the connection.");
break;
case REDIS_ERR_PROTOCOL:
syslog(LOG_ERR, "REDIS protocol error.");
break;
case REDIS_ERR_OTHER:
default:
syslog(LOG_ERR, "Unknown REDIS Error.");
break;
}
return context->err;
}
int RedisDriver_Finalize() {
redisFree(context);
return SUCCESS;
}
`
Environment:
Hardware: Raspberry PI 4B with 8 GB RAM
OS: Raspbian GNU/Linux 10 (buster)
Redis server: v=5.0.14 sha=00000000:0 malloc=libc bits=32 build=a6df2d1b76e73a91
Compiler: gcc (Raspbian 8.3.0-6+rpi1) 8.3.0
hiredis version: 0.14.0-3 armhf