1. Development environment
redis
2. Redis reports an error: NOAUTH Authentication required.
1. Set your password and open redis.window.conf file, search requirepass to view your password
2. For those without a password, there is a situation that can cause this error. Redis is running in the background. End redis in the background of the task manager and restart it
Error when starting redis service under window:
Creating server TCP listening socket 127.0.0.1:6379: bind no error
solution
1. Background
Redis has been running for a long time, and an error is reported one day as follows:
2. Phenomenon
org.redisson.client.RedisException: Unexpected exception while processing command
at org.redisson.command.CommandAsyncService.convertException(CommandAsyncService.java:338)
at org.redisson.command.CommandAsyncService.get(CommandAsyncService.java:140)
at org.redisson.RedissonObject.get(RedissonObject.java:90)
at org.redisson.RedissonBucket.set(RedissonBucket.java:131)
3. Solution
Restart the Java application!
What exactly caused it,
You can only guess the link pool of the redis client. Due to network and other reasons, the redis client has not responded for a long time and collapsed!
perfect
Error:
the redis service starts under the window, and an error is reported:
Creating server TCP listening socket *: 6379: bind: no error
Reason:
port 6379 has been bound. It should be because the service was not closed last time
Solution:
① enter the command in sequence:
Redis cli.exe
(start the redis client, connect to port 6379 of the local machine (127.0.0.1) and start the redis service) shutdownexit
② Start redis service: redis-server.exe redis. Windows.conf
[after configuring the service, start the service command redis server — service start close the service redis server — service stop]
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name ‘redissonController’: Unsatisfied dependency expressed through field ‘stringRedisTemplate’; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name ‘stringRedisTemplate’ defined in class path resource [org/springframework/boot/autoconfigure/data/redis/RedisAutoConfiguration.class]: Unsatisfied dependency expressed through method ‘stringRedisTemplate’ parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘redisConnectionFactory’ defined in class path resource [org/springframework/boot/autoconfigure/data/redis/JedisConnectionConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.redis.connection.jedis.JedisConnectionFactory]: Factory method ‘redisConnectionFactory’ threw exception; nested exception is java.lang.NoClassDefFoundError: redis/clients/util/SafeEncoder
2. Solution
springboot2.1.5 jedis3.3.0 The main reason is that jedis and spring-boot-starter-data-redis are not compatible with the version of the maven dependency, which is a frequent problem. The same is true for JedisConnectionFactory, which cannot be created. Changing to the following version will solve the problem
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.5.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
<exclusions>
<exclusion>
<groupId>io.lettuce</groupId>
<artifactId>lettuce-core</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>2.9.1</version>
</dependency>n error occurred while running Redis today. The error message is as follows:
(error) MISCONF Redis is configured to save RDB snapshots, but is currently not able to persist on disk. Commands that may modify the data set are disabled. Please check Redis logs for details about the error.
Redis is configured to save database snapshots, but it currently cannot be persisted to the hard disk. The command used to modify the collection data cannot be used. Please check the detailed error information in the Redis log.
the reason:
Forcibly shutting down Redis snapshots results in inability to persist.
solution:
After running the config set stop-writes-on-bgsave-error no command , close the configuration item stop-writes-on-bgsave-error to solve the problem.
root@ubuntu:/usr/local/redis/bin# ./redis-cli
127.0.0.1:6379> config set stop-writes-on-bgsave-error no
OK
127.0.0.1:6379> lpush myColour “red”
(integer ) 1
stay https://blog.csdn.net/zly_ On the basis of this blog post 9117 / article / details / 83349778, we found another error when starting redis. The error content is as follows
➜ 7000 ../redis-server redis.conf &
[1] 11045
11045:C 24 Oct 2018 19:26:52.320 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
11045:C 24 Oct 2018 19:26:52.320 # Redis version=999.999.999, bits=64, commit=54e8dd11, modified=0, pid=11045, just started
11045:C 24 Oct 2018 19:26:52.320 # Configuration loaded
11045:M 24 Oct 2018 19:26:52.322 * Increased maximum number of open files to 10032 (it was originally set to 7168).
11045:M 24 Oct 2018 19:26:52.323 # Unrecoverable error: corrupted cluster config file.The literal meaning is a damaged cluster configuration. Similarly, find the corresponding error throw point in the source code and find the following information
1. The output point of the error log is the code below
fmterr:
serverLog(LL_WARNING,
"Unrecoverable error: corrupted cluster config file.");
zfree(line);
if (fp) fclose(fp);
exit(1);
}According to the source code interpretation found that we did not build nodes.conf By default, this method returns a C_ Err, and then the caller clusterinit function creates a new file and a cluster. The overall code of clusterloadconfig function is as follows. But now I found this document and read it to prove it wrong redis.conf There is an error in the configuration file. After searching the configuration file, it is found that the parameter of cluster config file is configured incorrectly, and it is changed to cluster config file nodes.conf Problem solving.
/* Load the cluster config from 'filename'.
*
* If the file does not exist or is zero-length (this may happen because
* when we lock the nodes.conf file, we create a zero-length one for the
* sake of locking if it does not already exist), C_ERR is returned.
* If the configuration was loaded from the file, C_OK is returned. */
int clusterLoadConfig(char *filename) {
FILE *fp = fopen(filename,"r");
struct stat sb;
char *line;
int maxline, j;
if (fp == NULL) {
if (errno == ENOENT) {
return C_ERR;
} else {
serverLog(LL_WARNING,
"Loading the cluster node config from %s: %s",
filename, strerror(errno));
exit(1);
}
}
/* Check if the file is zero-length: if so return C_ERR to signal
* we have to write the config. */
if (fstat(fileno(fp),&sb) != -1 && sb.st_size == 0) {
fclose(fp);
return C_ERR;
}
/* Parse the file. Note that single lines of the cluster config file can
* be really long as they include all the hash slots of the node.
* This means in the worst possible case, half of the Redis slots will be
* present in a single line, possibly in importing or migrating state, so
* together with the node ID of the sender/receiver.
*
* To simplify we allocate 1024+CLUSTER_SLOTS*128 bytes per line. */
maxline = 1024+CLUSTER_SLOTS*128;
line = zmalloc(maxline);
while(fgets(line,maxline,fp) != NULL) {
int argc;
sds *argv;
clusterNode *n, *master;
char *p, *s;
/* Skip blank lines, they can be created either by users manually
* editing nodes.conf or by the config writing process if stopped
* before the truncate() call. */
if (line[0] == '\n' || line[0] == '\0') continue;
/* Split the line into arguments for processing. */
argv = sdssplitargs(line,&argc);
if (argv == NULL) goto fmterr;
/* Handle the special "vars" line. Don't pretend it is the last
* line even if it actually is when generated by Redis. */
if (strcasecmp(argv[0],"vars") == 0) {
for (j = 1; j < argc; j += 2) {
if (strcasecmp(argv[j],"currentEpoch") == 0) {
server.cluster->currentEpoch =
strtoull(argv[j+1],NULL,10);
} else if (strcasecmp(argv[j],"lastVoteEpoch") == 0) {
server.cluster->lastVoteEpoch =
strtoull(argv[j+1],NULL,10);
} else {
serverLog(LL_WARNING,
"Skipping unknown cluster config variable '%s'",
argv[j]);
}
}
sdsfreesplitres(argv,argc);
continue;
}
/* Regular config lines have at least eight fields */
if (argc < 8) goto fmterr;
/* Create this node if it does not exist */
n = clusterLookupNode(argv[0]);
if (!n) {
n = createClusterNode(argv[0],0);
clusterAddNode(n);
}
/* Address and port */
if ((p = strrchr(argv[1],':')) == NULL) goto fmterr;
*p = '\0';
memcpy(n->ip,argv[1],strlen(argv[1])+1);
char *port = p+1;
char *busp = strchr(port,'@');
if (busp) {
*busp = '\0';
busp++;
}
n->port = atoi(port);
/* In older versions of nodes.conf the "@busport" part is missing.
* In this case we set it to the default offset of 10000 from the
* base port. */
n->cport = busp ? atoi(busp) : n->port + CLUSTER_PORT_INCR;
/* Parse flags */
p = s = argv[2];
while(p) {
p = strchr(s,',');
if (p) *p = '\0';
if (!strcasecmp(s,"myself")) {
serverAssert(server.cluster->myself == NULL);
myself = server.cluster->myself = n;
n->flags |= CLUSTER_NODE_MYSELF;
} else if (!strcasecmp(s,"master")) {
n->flags |= CLUSTER_NODE_MASTER;
} else if (!strcasecmp(s,"slave")) {
n->flags |= CLUSTER_NODE_SLAVE;
} else if (!strcasecmp(s,"fail?")) {
n->flags |= CLUSTER_NODE_PFAIL;
} else if (!strcasecmp(s,"fail")) {
n->flags |= CLUSTER_NODE_FAIL;
n->fail_time = mstime();
} else if (!strcasecmp(s,"handshake")) {
n->flags |= CLUSTER_NODE_HANDSHAKE;
} else if (!strcasecmp(s,"noaddr")) {
n->flags |= CLUSTER_NODE_NOADDR;
} else if (!strcasecmp(s,"nofailover")) {
n->flags |= CLUSTER_NODE_NOFAILOVER;
} else if (!strcasecmp(s,"noflags")) {
/* nothing to do */
} else {
serverPanic("Unknown flag in redis cluster config file");
}
if (p) s = p+1;
}
/* Get master if any. Set the master and populate master's
* slave list. */
if (argv[3][0] != '-') {
master = clusterLookupNode(argv[3]);
if (!master) {
master = createClusterNode(argv[3],0);
clusterAddNode(master);
}
n->slaveof = master;
clusterNodeAddSlave(master,n);
}
/* Set ping sent / pong received timestamps */
if (atoi(argv[4])) n->ping_sent = mstime();
if (atoi(argv[5])) n->pong_received = mstime();
/* Set configEpoch for this node. */
n->configEpoch = strtoull(argv[6],NULL,10);
/* Populate hash slots served by this instance. */
for (j = 8; j < argc; j++) {
int start, stop;
if (argv[j][0] == '[') {
/* Here we handle migrating / importing slots */
int slot;
char direction;
clusterNode *cn;
p = strchr(argv[j],'-');
serverAssert(p != NULL);
*p = '\0';
direction = p[1]; /* Either '>' or '<' */
slot = atoi(argv[j]+1);
if (slot < 0 || slot >= CLUSTER_SLOTS) goto fmterr;
p += 3;
cn = clusterLookupNode(p);
if (!cn) {
cn = createClusterNode(p,0);
clusterAddNode(cn);
}
if (direction == '>') {
server.cluster->migrating_slots_to[slot] = cn;
} else {
server.cluster->importing_slots_from[slot] = cn;
}
continue;
} else if ((p = strchr(argv[j],'-')) != NULL) {
*p = '\0';
start = atoi(argv[j]);
stop = atoi(p+1);
} else {
start = stop = atoi(argv[j]);
}
if (start < 0 || start >= CLUSTER_SLOTS) goto fmterr;
if (stop < 0 || stop >= CLUSTER_SLOTS) goto fmterr;
while(start <= stop) clusterAddSlot(n, start++);
}
sdsfreesplitres(argv,argc);
}
/* Config sanity check */
if (server.cluster->myself == NULL) goto fmterr;
zfree(line);
fclose(fp);
serverLog(LL_NOTICE,"Node configuration loaded, I'm %.40s", myself->name);
/* Something that should never happen: currentEpoch smaller than
* the max epoch found in the nodes configuration. However we handle this
* as some form of protection against manual editing of critical files. */
if (clusterGetMaxEpoch() > server.cluster->currentEpoch) {
server.cluster->currentEpoch = clusterGetMaxEpoch();
}
return C_OK;
fmterr:
serverLog(LL_WARNING,
"Unrecoverable error: corrupted cluster config file.");
zfree(line);
if (fp) fclose(fp);
exit(1);
}