我正在尝试运行一个简单的程序,该程序会将键值插入到我的6个实例(3个主副本,3个副本)的redis集群中。我正在使用hiredis-vip。
这是程序:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <hircluster.h>
int main(int argc, char **argv)
{
struct timeval timeout = { 1, 500000 }; // 1.5 seconds
redisClusterContext *cc = redisClusterContextInit();
redisClusterSetOptionAddNodes(cc, "172.16.129.68:6379");
redisClusterSetOptionConnectTimeout(cc, timeout);
redisClusterConnect2(cc);
if (cc != NULL && cc->err) {
printf("Error: %s\n", cc->errstr);
// handle error
exit(-1);
}
redisReply *reply;
reply = (redisReply*)(redisClusterCommand(cc,"SET %s %s", "foo", "hello vishal"));
printf("SET: %s\n", reply->str);
freeReplyObject(reply);
redisClusterFree(cc);
return 0;
}
在运行程序时,出现了分段错误:
Program received signal SIGSEGV, Segmentation fault.
0x00000000004009ed in main (argc=1, argv=0x7fffffffe508) at cluster-example.c:30
30 printf("SET: %s\n", reply->str);
Missing separate debuginfos, use: debuginfo-install glibc-2.12-1.209.el6_9.2.x86_64 libgcc-4.4.7-18.el6_9.2.x86_64 libstdc++-4.4.7-18.el6_9.2.x86_64
(gdb) bt f
#0 0x00000000004009ed in main (argc=1, argv=0x7fffffffe508) at cluster-example.c:30
timeout = {tv_sec = 1, tv_usec = 500000}
cc = 0x7ffff7fdb010
reply = 0x0
redisReply *
具有NULL值,当我在printf()
中使用此指针时,会导致分段错误。
程序有什么问题?
编辑1
根据@Stamatis Liatsos的建议,我已经更新了程序的一部分:
reply = (redisReply*)(redisClusterCommand(cc,"SET %s %s", "foo", "hello vishal"));
if(cc->err)
printf("\n[%s::%d]Error: %s\n", __FILE__,__LINE__,cc->errstr);
else
printf("SET: %s\n", reply->str);
这是我得到的输出:
[cluster-example.c::31]Error: ctx get by node is null
答案 0 :(得分:0)
我在here上找到了解决此确切问题的方法。
我们必须设置上下文以在连接之前使用插槽。
struct timeval timeout = { 1, 500000 }; // 1.5 seconds
redisClusterContext *cc = redisClusterContextInit();
redisClusterSetOptionAddNodes(cc, "172.16.129.68:6379");
redisClusterSetOptionConnectTimeout(cc, timeout);
redisClusterSetOptionRouteUseSlots(cc); //The function that has to be called.
redisClusterConnect2(cc);
if (cc != NULL && cc->err) {
printf("Error: %s\n", cc->errstr);
// handle error
exit(-1);
}