void replicationFeedSlaves(list *slaves, int dictid, robj **argv, int argc) {
listNode *ln;
listIter li;
- int outc = 0, j;
- robj **outv;
- /* We need 1+(ARGS*3) objects since commands are using the new protocol
- * and we one 1 object for the first "*<count>\r\n" multibulk count, then
- * for every additional object we have "$<count>\r\n" + object + "\r\n". */
- robj *static_outv[REDIS_STATIC_ARGS*3+1];
- robj *lenobj;
-
- if (argc <= REDIS_STATIC_ARGS) {
- outv = static_outv;
- } else {
- outv = zmalloc(sizeof(robj*)*(argc*3+1));
- }
-
- lenobj = createObject(REDIS_STRING,
- sdscatprintf(sdsempty(), "*%d\r\n", argc));
- lenobj->refcount = 0;
- outv[outc++] = lenobj;
- for (j = 0; j < argc; j++) {
- lenobj = createObject(REDIS_STRING,
- sdscatprintf(sdsempty(),"$%lu\r\n",
- (unsigned long) stringObjectLen(argv[j])));
- lenobj->refcount = 0;
- outv[outc++] = lenobj;
- outv[outc++] = argv[j];
- outv[outc++] = shared.crlf;
- }
+ int j;
- /* Increment all the refcounts at start and decrement at end in order to
- * be sure to free objects if there is no slave in a replication state
- * able to be feed with commands */
- for (j = 0; j < outc; j++) incrRefCount(outv[j]);
listRewind(slaves,&li);
while((ln = listNext(&li))) {
redisClient *slave = ln->value;
/* Don't feed slaves that are still waiting for BGSAVE to start */
if (slave->replstate == REDIS_REPL_WAIT_BGSAVE_START) continue;
- /* Feed all the other slaves, MONITORs and so on */
+ /* Feed slaves that are waiting for the initial SYNC (so these commands
+ * are queued in the output buffer until the intial SYNC completes),
+ * or are already in sync with the master. */
if (slave->slaveseldb != dictid) {
robj *selectcmd;
addReply(slave,selectcmd);
slave->slaveseldb = dictid;
}
- for (j = 0; j < outc; j++) addReply(slave,outv[j]);
+ addReplyMultiBulkLen(slave,argc);
+ for (j = 0; j < argc; j++) addReplyBulk(slave,argv[j]);
}
- for (j = 0; j < outc; j++) decrRefCount(outv[j]);
- if (outv != static_outv) zfree(outv);
}
void replicationFeedMonitors(list *monitors, int dictid, robj **argv, int argc) {
/* If repl_transfer_left == -1 we still have to read the bulk length
* from the master reply. */
if (server.repl_transfer_left == -1) {
- if (syncReadLine(fd,buf,1024,3600) == -1) {
+ if (syncReadLine(fd,buf,1024,server.repl_syncio_timeout) == -1) {
redisLog(REDIS_WARNING,
"I/O error reading bulk count from MASTER: %s",
strerror(errno));
- replicationAbortSyncTransfer();
- return;
+ goto error;
}
+
if (buf[0] == '-') {
redisLog(REDIS_WARNING,
"MASTER aborted replication with an error: %s",
buf+1);
- replicationAbortSyncTransfer();
- return;
+ goto error;
} else if (buf[0] == '\0') {
/* At this stage just a newline works as a PING in order to take
* the connection live. So we refresh our last interaction
return;
} else if (buf[0] != '$') {
redisLog(REDIS_WARNING,"Bad protocol from MASTER, the first byte is not '$', are you sure the host and port are right?");
- replicationAbortSyncTransfer();
- return;
+ goto error;
}
server.repl_transfer_left = strtol(buf+1,NULL,10);
redisLog(REDIS_NOTICE,
server.repl_transfer_lastio = time(NULL);
if (write(server.repl_transfer_fd,buf,nread) != nread) {
redisLog(REDIS_WARNING,"Write error or short write writing to the DB dump file needed for MASTER <-> SLAVE synchrnonization: %s", strerror(errno));
- replicationAbortSyncTransfer();
- return;
+ goto error;
}
server.repl_transfer_left -= nread;
/* Check if the transfer is now complete */
server.master->authenticated = 1;
server.replstate = REDIS_REPL_CONNECTED;
redisLog(REDIS_NOTICE, "MASTER <-> SLAVE sync: Finished with success");
+ /* Rewrite the AOF file now that the dataset changed. */
+ if (server.appendonly) rewriteAppendOnlyFileBackground();
}
+
+ return;
+
+error:
+ replicationAbortSyncTransfer();
+ return;
}
void syncWithMaster(aeEventLoop *el, int fd, void *privdata, int mask) {
REDIS_NOTUSED(privdata);
REDIS_NOTUSED(mask);
- /* Remove this event before anything else. */
+ /* If this event fired after the user turned the instance into a master
+ * with SLAVEOF NO ONE we must just return ASAP. */
+ if (server.replstate == REDIS_REPL_NONE) {
+ close(fd);
+ return;
+ }
+
+ redisLog(REDIS_NOTICE,"Non blocking connect for SYNC fired the event.");
+ /* This event should only be triggered once since it is used to have a
+ * non-blocking connect(2) to the master. It has been triggered when this
+ * function is called, so we can delete it. */
aeDeleteFileEvent(server.el,fd,AE_READABLE|AE_WRITABLE);
/* AUTH with the master if required. */
size_t authlen;
authlen = snprintf(authcmd,sizeof(authcmd),"AUTH %s\r\n",server.masterauth);
- if (syncWrite(fd,authcmd,authlen,5) == -1) {
+ if (syncWrite(fd,authcmd,authlen,server.repl_syncio_timeout) == -1) {
redisLog(REDIS_WARNING,"Unable to AUTH to MASTER: %s",
strerror(errno));
goto error;
}
/* Read the AUTH result. */
- if (syncReadLine(fd,buf,1024,3600) == -1) {
+ if (syncReadLine(fd,buf,1024,server.repl_syncio_timeout) == -1) {
redisLog(REDIS_WARNING,"I/O error reading auth result from MASTER: %s",
strerror(errno));
goto error;
}
/* Issue the SYNC command */
- if (syncWrite(fd,"SYNC \r\n",7,5) == -1) {
+ if (syncWrite(fd,"SYNC \r\n",7,server.repl_syncio_timeout) == -1) {
redisLog(REDIS_WARNING,"I/O error writing to MASTER: %s",
strerror(errno));
goto error;
return REDIS_ERR;
}
- if (aeCreateFileEvent(server.el,fd,AE_READABLE|AE_WRITABLE,
- syncWithMaster,NULL) == AE_ERR)
+ if (aeCreateFileEvent(server.el,fd,AE_READABLE|AE_WRITABLE,syncWithMaster,NULL) ==
+ AE_ERR)
{
close(fd);
redisLog(REDIS_WARNING,"Can't create readable event for SYNC");
/* --------------------------- REPLICATION CRON ---------------------------- */
-#define REDIS_REPL_TIMEOUT 60
-#define REDIS_REPL_PING_SLAVE_PERIOD 10
-
void replicationCron(void) {
/* Bulk transfer I/O timeout? */
if (server.masterhost && server.replstate == REDIS_REPL_TRANSFER &&
- (time(NULL)-server.repl_transfer_lastio) > REDIS_REPL_TIMEOUT)
+ (time(NULL)-server.repl_transfer_lastio) > server.repl_timeout)
{
redisLog(REDIS_WARNING,"Timeout receiving bulk data from MASTER...");
replicationAbortSyncTransfer();
/* Timed out master when we are an already connected slave? */
if (server.masterhost && server.replstate == REDIS_REPL_CONNECTED &&
- (time(NULL)-server.master->lastinteraction) > REDIS_REPL_TIMEOUT)
+ (time(NULL)-server.master->lastinteraction) > server.repl_timeout)
{
redisLog(REDIS_WARNING,"MASTER time out: no data nor PING received...");
freeClient(server.master);
redisLog(REDIS_NOTICE,"Connecting to MASTER...");
if (connectWithMaster() == REDIS_OK) {
redisLog(REDIS_NOTICE,"MASTER <-> SLAVE sync started");
- if (server.appendonly) rewriteAppendOnlyFileBackground();
}
}
* So slaves can implement an explicit timeout to masters, and will
* be able to detect a link disconnection even if the TCP connection
* will not actually go down. */
- if (!(server.cronloops % (REDIS_REPL_PING_SLAVE_PERIOD*10))) {
+ if (!(server.cronloops % (server.repl_ping_slave_period*10))) {
listIter li;
listNode *ln;
projects / redis.git / blobdiff