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Date: Tue, 7 Feb 2012 12:12:18 -0800 (PST)
From: mfthom <mfthom@gmail.com>
To: zookeeper-user@hadoop.apache.org
Message-ID: <1328645538004-7263621.post@n2.nabble.com>
Subject: c binding asynchronous get problem
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I'm having trouble with a c client doing an asynchronous get.  This code:
#include <zookeeper.h>
#include <stdio.h>
#include <pthread.h>
#include <assert.h>
char *Z = "/fuzz/targets/targ0000000002";

int main(int argc, char **argv) {
        static zhandle_t *zh = NULL;
        char ip[8192];
        int len;
        struct Stat stat;
        printf("here here \n");
        zh = zookeeper_init("172.20.110.100:2181", NULL, 30000, 0, 0, 0);
        int rc = zoo_get(zh, Z, 0, ip, &len, &stat);
        if(rc != ZOK)
        {
                printf("crash\n");
        }else{
                printf("ip is %s len is %d\n", ip, len);
        }
}

will fail or work depending on the size of the ip array.  1024 works
usually.  8292 fails.
The failure symptom is that it returns a len of zero bytes instead of the
data (a simple IP address).

And sometimes, zookeeper seg faults while doing memcpy.

Thanks,
--Mike

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