FrancisHe created ZOOKEEPER-4538:
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Summary: c client use a static global variable addr_rw_server to
save a zhandle's member will cause problem if there are multiple zhandle
connecting multiple ZooKeeper ensembles
Key: ZOOKEEPER-4538
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-4538
Project: ZooKeeper
Issue Type: Bug
Components: c client
Reporter: FrancisHe
Since addr_rw_server is static global, if there are multiple zhandle
corresponding to multiple ZooKeeper ensembles(e.g. a.zookeeper.com,
b.zookeer.com), the global addr_rw_server may pointer to address of
a.zookeer.com when we use zhandle of b.zookeeper.com:
{code:java}
static struct sockaddr_storage *addr_rw_server = 0;
// in ping_rw_server
addr_rw_server = rc ? &zh->addr_rw_server : 0;
// in zookeeper_interest
if (addr_rw_server) {
zh->addr_cur = *addr_rw_server;
addr_rw_server = 0;
} else {
// No need to delay -- grab the next server and attempt connection
zoo_cycle_next_server(zh);
}{code}
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