Java client can't connect to Redis Sentinel which is running on localhost
I have setup 3 Redis Server and 3 Redis Sentinel instances in my localhost. The servers are running at:
127.0.0.1:6379 // Master
127.0.0.1:6380 // Slave
127.0.0.1:6381 // Slave
and the sentinels are running at:
127.0.0.1:5000
127.0.0.1:5001
127.0.0.1:5002
I have a (Java) client that tries to connect to one of the sentinels and set the keys in redis server:
// import statements
public class RedisPush {
private static final String MASTER_NAME = "mymaster";
private static final String PASSWORD = "foobared";
private static final Set sentinels;
static {
sentinels = new HashSet();
sentinels.add("127.0.0.1:5000");
sentinels.add("127.0.0.1:5001");
sentinels.add("127.0.0.1:5002");
}
public static void pushToRedis() {
Jedis jedis = null;
try {
JedisSentinelPool pool = new JedisSentinelPool(MASTER_NAME, sentinels);
System.out.println("Fetching connection from pool.");
jedis = pool.getResource();
jedis.auth(PASSWORD);
Socket socket = jedis.getClient().getSocket();
System.out.println("Connected to " + socket.getRemoteSocketAddress());
int i = 0;
while (true) {
jedis.set("sentinel_key" + i, "value" + i);
System.out.println(i);
i++;
Thread.sleep(1000);
}
} catch (Exception e) {
e.printStackTrace();
}
finally {
if(jedis != null)
jedis.close();
}
}
public static void main(String args) throws Exception {
while(true) {
pushToRedis();
Thread.sleep(1000);
}
}
}
Initially, my sentinel configuration is as follows (for example, the first sentinel running on port 5000
):
bind 127.0.0.1
port 5000
sentinel monitor mymaster 127.0.0.1 6379 2
sentinel down-after-milliseconds mymaster 5000
sentinel failover-timeout mymaster 60000
sentinel auth-pass mymaster foobared
If I try to run my (Java) client, I get the following error:
Nov 23, 2018 1:52:57 AM redis.clients.jedis.JedisSentinelPool initSentinels
INFO: Trying to find master from available Sentinels...
Nov 23, 2018 1:52:57 AM redis.clients.jedis.JedisSentinelPool initSentinels
WARNING: Cannot get master address from sentinel running @ 192.168.0.102:5001. Reason: redis.clients.jedis.exceptions.JedisConnectionException: java.net.ConnectException: Connection refused (Connection refused). Trying next one.
Nov 23, 2018 1:52:57 AM redis.clients.jedis.JedisSentinelPool initSentinels
WARNING: Cannot get master address from sentinel running @ 192.168.0.102:5000. Reason: redis.clients.jedis.exceptions.JedisConnectionException: java.net.ConnectException: Connection refused (Connection refused). Trying next one.
Nov 23, 2018 1:52:57 AM redis.clients.jedis.JedisSentinelPool initSentinels
WARNING: Cannot get master address from sentinel running @ 192.168.0.102:5002. Reason: redis.clients.jedis.exceptions.JedisConnectionException: java.net.ConnectException: Connection refused (Connection refused). Trying next one.
redis.clients.jedis.exceptions.JedisConnectionException: All sentinels down, cannot determine where is mymaster master is running...
at redis.clients.jedis.JedisSentinelPool.initSentinels(JedisSentinelPool.java:180)
at redis.clients.jedis.JedisSentinelPool.<init>(JedisSentinelPool.java:95)
at redis.clients.jedis.JedisSentinelPool.<init>(JedisSentinelPool.java:82)
at redis.clients.jedis.JedisSentinelPool.<init>(JedisSentinelPool.java:70)
at redis.clients.jedis.JedisSentinelPool.<init>(JedisSentinelPool.java:44)
at RedisPush.pushToRedis(RedisPush.java:29)
at RedisPush.main(RedisPush.java:61)
However, if I change my sentinel configuration script to the one below:
# bind 127.0.0.1
port 5000
protected-mode no
sentinel monitor mymaster 127.0.0.1 6379 2
sentinel down-after-milliseconds mymaster 5000
sentinel failover-timeout mymaster 60000
sentinel auth-pass mymaster foobared
the client works perfectly. I don't understand why.
AFAIK, if requirepass
is not set in sentinel.conf
file AND bind
is commented in sentinel.conf
file, ONLY then protected-mode
will be yes
to avoid any client connecting to the sentinel apart from localhost
. In my first sentinel configuration, I had the bind
command but still it didn't work.
Why does commenting out bind
and explicitly setting protected-mode
to no
works?
P.S. I also tried having both bind 127.0.0.1
and protected-mode no
but even that didn't work.
java redis jedis redis-sentinel redis-server
add a comment |
I have setup 3 Redis Server and 3 Redis Sentinel instances in my localhost. The servers are running at:
127.0.0.1:6379 // Master
127.0.0.1:6380 // Slave
127.0.0.1:6381 // Slave
and the sentinels are running at:
127.0.0.1:5000
127.0.0.1:5001
127.0.0.1:5002
I have a (Java) client that tries to connect to one of the sentinels and set the keys in redis server:
// import statements
public class RedisPush {
private static final String MASTER_NAME = "mymaster";
private static final String PASSWORD = "foobared";
private static final Set sentinels;
static {
sentinels = new HashSet();
sentinels.add("127.0.0.1:5000");
sentinels.add("127.0.0.1:5001");
sentinels.add("127.0.0.1:5002");
}
public static void pushToRedis() {
Jedis jedis = null;
try {
JedisSentinelPool pool = new JedisSentinelPool(MASTER_NAME, sentinels);
System.out.println("Fetching connection from pool.");
jedis = pool.getResource();
jedis.auth(PASSWORD);
Socket socket = jedis.getClient().getSocket();
System.out.println("Connected to " + socket.getRemoteSocketAddress());
int i = 0;
while (true) {
jedis.set("sentinel_key" + i, "value" + i);
System.out.println(i);
i++;
Thread.sleep(1000);
}
} catch (Exception e) {
e.printStackTrace();
}
finally {
if(jedis != null)
jedis.close();
}
}
public static void main(String args) throws Exception {
while(true) {
pushToRedis();
Thread.sleep(1000);
}
}
}
Initially, my sentinel configuration is as follows (for example, the first sentinel running on port 5000
):
bind 127.0.0.1
port 5000
sentinel monitor mymaster 127.0.0.1 6379 2
sentinel down-after-milliseconds mymaster 5000
sentinel failover-timeout mymaster 60000
sentinel auth-pass mymaster foobared
If I try to run my (Java) client, I get the following error:
Nov 23, 2018 1:52:57 AM redis.clients.jedis.JedisSentinelPool initSentinels
INFO: Trying to find master from available Sentinels...
Nov 23, 2018 1:52:57 AM redis.clients.jedis.JedisSentinelPool initSentinels
WARNING: Cannot get master address from sentinel running @ 192.168.0.102:5001. Reason: redis.clients.jedis.exceptions.JedisConnectionException: java.net.ConnectException: Connection refused (Connection refused). Trying next one.
Nov 23, 2018 1:52:57 AM redis.clients.jedis.JedisSentinelPool initSentinels
WARNING: Cannot get master address from sentinel running @ 192.168.0.102:5000. Reason: redis.clients.jedis.exceptions.JedisConnectionException: java.net.ConnectException: Connection refused (Connection refused). Trying next one.
Nov 23, 2018 1:52:57 AM redis.clients.jedis.JedisSentinelPool initSentinels
WARNING: Cannot get master address from sentinel running @ 192.168.0.102:5002. Reason: redis.clients.jedis.exceptions.JedisConnectionException: java.net.ConnectException: Connection refused (Connection refused). Trying next one.
redis.clients.jedis.exceptions.JedisConnectionException: All sentinels down, cannot determine where is mymaster master is running...
at redis.clients.jedis.JedisSentinelPool.initSentinels(JedisSentinelPool.java:180)
at redis.clients.jedis.JedisSentinelPool.<init>(JedisSentinelPool.java:95)
at redis.clients.jedis.JedisSentinelPool.<init>(JedisSentinelPool.java:82)
at redis.clients.jedis.JedisSentinelPool.<init>(JedisSentinelPool.java:70)
at redis.clients.jedis.JedisSentinelPool.<init>(JedisSentinelPool.java:44)
at RedisPush.pushToRedis(RedisPush.java:29)
at RedisPush.main(RedisPush.java:61)
However, if I change my sentinel configuration script to the one below:
# bind 127.0.0.1
port 5000
protected-mode no
sentinel monitor mymaster 127.0.0.1 6379 2
sentinel down-after-milliseconds mymaster 5000
sentinel failover-timeout mymaster 60000
sentinel auth-pass mymaster foobared
the client works perfectly. I don't understand why.
AFAIK, if requirepass
is not set in sentinel.conf
file AND bind
is commented in sentinel.conf
file, ONLY then protected-mode
will be yes
to avoid any client connecting to the sentinel apart from localhost
. In my first sentinel configuration, I had the bind
command but still it didn't work.
Why does commenting out bind
and explicitly setting protected-mode
to no
works?
P.S. I also tried having both bind 127.0.0.1
and protected-mode no
but even that didn't work.
java redis jedis redis-sentinel redis-server
add a comment |
I have setup 3 Redis Server and 3 Redis Sentinel instances in my localhost. The servers are running at:
127.0.0.1:6379 // Master
127.0.0.1:6380 // Slave
127.0.0.1:6381 // Slave
and the sentinels are running at:
127.0.0.1:5000
127.0.0.1:5001
127.0.0.1:5002
I have a (Java) client that tries to connect to one of the sentinels and set the keys in redis server:
// import statements
public class RedisPush {
private static final String MASTER_NAME = "mymaster";
private static final String PASSWORD = "foobared";
private static final Set sentinels;
static {
sentinels = new HashSet();
sentinels.add("127.0.0.1:5000");
sentinels.add("127.0.0.1:5001");
sentinels.add("127.0.0.1:5002");
}
public static void pushToRedis() {
Jedis jedis = null;
try {
JedisSentinelPool pool = new JedisSentinelPool(MASTER_NAME, sentinels);
System.out.println("Fetching connection from pool.");
jedis = pool.getResource();
jedis.auth(PASSWORD);
Socket socket = jedis.getClient().getSocket();
System.out.println("Connected to " + socket.getRemoteSocketAddress());
int i = 0;
while (true) {
jedis.set("sentinel_key" + i, "value" + i);
System.out.println(i);
i++;
Thread.sleep(1000);
}
} catch (Exception e) {
e.printStackTrace();
}
finally {
if(jedis != null)
jedis.close();
}
}
public static void main(String args) throws Exception {
while(true) {
pushToRedis();
Thread.sleep(1000);
}
}
}
Initially, my sentinel configuration is as follows (for example, the first sentinel running on port 5000
):
bind 127.0.0.1
port 5000
sentinel monitor mymaster 127.0.0.1 6379 2
sentinel down-after-milliseconds mymaster 5000
sentinel failover-timeout mymaster 60000
sentinel auth-pass mymaster foobared
If I try to run my (Java) client, I get the following error:
Nov 23, 2018 1:52:57 AM redis.clients.jedis.JedisSentinelPool initSentinels
INFO: Trying to find master from available Sentinels...
Nov 23, 2018 1:52:57 AM redis.clients.jedis.JedisSentinelPool initSentinels
WARNING: Cannot get master address from sentinel running @ 192.168.0.102:5001. Reason: redis.clients.jedis.exceptions.JedisConnectionException: java.net.ConnectException: Connection refused (Connection refused). Trying next one.
Nov 23, 2018 1:52:57 AM redis.clients.jedis.JedisSentinelPool initSentinels
WARNING: Cannot get master address from sentinel running @ 192.168.0.102:5000. Reason: redis.clients.jedis.exceptions.JedisConnectionException: java.net.ConnectException: Connection refused (Connection refused). Trying next one.
Nov 23, 2018 1:52:57 AM redis.clients.jedis.JedisSentinelPool initSentinels
WARNING: Cannot get master address from sentinel running @ 192.168.0.102:5002. Reason: redis.clients.jedis.exceptions.JedisConnectionException: java.net.ConnectException: Connection refused (Connection refused). Trying next one.
redis.clients.jedis.exceptions.JedisConnectionException: All sentinels down, cannot determine where is mymaster master is running...
at redis.clients.jedis.JedisSentinelPool.initSentinels(JedisSentinelPool.java:180)
at redis.clients.jedis.JedisSentinelPool.<init>(JedisSentinelPool.java:95)
at redis.clients.jedis.JedisSentinelPool.<init>(JedisSentinelPool.java:82)
at redis.clients.jedis.JedisSentinelPool.<init>(JedisSentinelPool.java:70)
at redis.clients.jedis.JedisSentinelPool.<init>(JedisSentinelPool.java:44)
at RedisPush.pushToRedis(RedisPush.java:29)
at RedisPush.main(RedisPush.java:61)
However, if I change my sentinel configuration script to the one below:
# bind 127.0.0.1
port 5000
protected-mode no
sentinel monitor mymaster 127.0.0.1 6379 2
sentinel down-after-milliseconds mymaster 5000
sentinel failover-timeout mymaster 60000
sentinel auth-pass mymaster foobared
the client works perfectly. I don't understand why.
AFAIK, if requirepass
is not set in sentinel.conf
file AND bind
is commented in sentinel.conf
file, ONLY then protected-mode
will be yes
to avoid any client connecting to the sentinel apart from localhost
. In my first sentinel configuration, I had the bind
command but still it didn't work.
Why does commenting out bind
and explicitly setting protected-mode
to no
works?
P.S. I also tried having both bind 127.0.0.1
and protected-mode no
but even that didn't work.
java redis jedis redis-sentinel redis-server
I have setup 3 Redis Server and 3 Redis Sentinel instances in my localhost. The servers are running at:
127.0.0.1:6379 // Master
127.0.0.1:6380 // Slave
127.0.0.1:6381 // Slave
and the sentinels are running at:
127.0.0.1:5000
127.0.0.1:5001
127.0.0.1:5002
I have a (Java) client that tries to connect to one of the sentinels and set the keys in redis server:
// import statements
public class RedisPush {
private static final String MASTER_NAME = "mymaster";
private static final String PASSWORD = "foobared";
private static final Set sentinels;
static {
sentinels = new HashSet();
sentinels.add("127.0.0.1:5000");
sentinels.add("127.0.0.1:5001");
sentinels.add("127.0.0.1:5002");
}
public static void pushToRedis() {
Jedis jedis = null;
try {
JedisSentinelPool pool = new JedisSentinelPool(MASTER_NAME, sentinels);
System.out.println("Fetching connection from pool.");
jedis = pool.getResource();
jedis.auth(PASSWORD);
Socket socket = jedis.getClient().getSocket();
System.out.println("Connected to " + socket.getRemoteSocketAddress());
int i = 0;
while (true) {
jedis.set("sentinel_key" + i, "value" + i);
System.out.println(i);
i++;
Thread.sleep(1000);
}
} catch (Exception e) {
e.printStackTrace();
}
finally {
if(jedis != null)
jedis.close();
}
}
public static void main(String args) throws Exception {
while(true) {
pushToRedis();
Thread.sleep(1000);
}
}
}
Initially, my sentinel configuration is as follows (for example, the first sentinel running on port 5000
):
bind 127.0.0.1
port 5000
sentinel monitor mymaster 127.0.0.1 6379 2
sentinel down-after-milliseconds mymaster 5000
sentinel failover-timeout mymaster 60000
sentinel auth-pass mymaster foobared
If I try to run my (Java) client, I get the following error:
Nov 23, 2018 1:52:57 AM redis.clients.jedis.JedisSentinelPool initSentinels
INFO: Trying to find master from available Sentinels...
Nov 23, 2018 1:52:57 AM redis.clients.jedis.JedisSentinelPool initSentinels
WARNING: Cannot get master address from sentinel running @ 192.168.0.102:5001. Reason: redis.clients.jedis.exceptions.JedisConnectionException: java.net.ConnectException: Connection refused (Connection refused). Trying next one.
Nov 23, 2018 1:52:57 AM redis.clients.jedis.JedisSentinelPool initSentinels
WARNING: Cannot get master address from sentinel running @ 192.168.0.102:5000. Reason: redis.clients.jedis.exceptions.JedisConnectionException: java.net.ConnectException: Connection refused (Connection refused). Trying next one.
Nov 23, 2018 1:52:57 AM redis.clients.jedis.JedisSentinelPool initSentinels
WARNING: Cannot get master address from sentinel running @ 192.168.0.102:5002. Reason: redis.clients.jedis.exceptions.JedisConnectionException: java.net.ConnectException: Connection refused (Connection refused). Trying next one.
redis.clients.jedis.exceptions.JedisConnectionException: All sentinels down, cannot determine where is mymaster master is running...
at redis.clients.jedis.JedisSentinelPool.initSentinels(JedisSentinelPool.java:180)
at redis.clients.jedis.JedisSentinelPool.<init>(JedisSentinelPool.java:95)
at redis.clients.jedis.JedisSentinelPool.<init>(JedisSentinelPool.java:82)
at redis.clients.jedis.JedisSentinelPool.<init>(JedisSentinelPool.java:70)
at redis.clients.jedis.JedisSentinelPool.<init>(JedisSentinelPool.java:44)
at RedisPush.pushToRedis(RedisPush.java:29)
at RedisPush.main(RedisPush.java:61)
However, if I change my sentinel configuration script to the one below:
# bind 127.0.0.1
port 5000
protected-mode no
sentinel monitor mymaster 127.0.0.1 6379 2
sentinel down-after-milliseconds mymaster 5000
sentinel failover-timeout mymaster 60000
sentinel auth-pass mymaster foobared
the client works perfectly. I don't understand why.
AFAIK, if requirepass
is not set in sentinel.conf
file AND bind
is commented in sentinel.conf
file, ONLY then protected-mode
will be yes
to avoid any client connecting to the sentinel apart from localhost
. In my first sentinel configuration, I had the bind
command but still it didn't work.
Why does commenting out bind
and explicitly setting protected-mode
to no
works?
P.S. I also tried having both bind 127.0.0.1
and protected-mode no
but even that didn't work.
java redis jedis redis-sentinel redis-server
java redis jedis redis-sentinel redis-server
edited Nov 25 '18 at 10:35
Shubham
asked Nov 22 '18 at 20:36
ShubhamShubham
2,00021527
2,00021527
add a comment |
add a comment |
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