# Kafka mirror maker2 doesn't work,

**URL:** <https://forum.confluent.io/t/kafka-mirror-maker2-doesnt-work/5817>\
**Category:** Self-Managed Connectors\
**Created:** [18 August 2022 07:57 UTC](https://forum.confluent.io/t/kafka-mirror-maker2-doesnt-work/5817 "2022-08-18T07:57:29Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![irfan](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.confluent.io/irfan/32/2134_2.png) [@irfan](https://forum.confluent.io/u/irfan)\
**Post date:** [18 August 2022 07:57 UTC](https://forum.confluent.io/t/kafka-mirror-maker2-doesnt-work/5817/1 "2022-08-18T07:57:29Z")

</div>

Hi,

We have 3 nodes kafka cluster with A side, we want to replicate to B side, but mirrormaker 2 couldn’t connect to A side cluster, as below of we have settings and error messages, we don’t have SSL authentication, used with SASL\_PLAINTEXT,

server.properties

security.inter.broker.protocol=SASL\_PLAINTEXT  
sasl.mechanism.inter.broker.protocol=PLAIN  
sasl.enabled.mechanisms=PLAIN  
authorizer.class.name=kafka.security.auth.SimpleAclAuthorizer  
listeners=SASL\_PLAINTEXT://rota-dr-kafka01:9093  
advertised.listeners=SASL\_PLAINTEXT://rota-dr-kafka01:9093  
super.users=User:admin;User:arpclient  
enable.ssl.certificate.verification=false

zookeeper.connect=zookeeper4:2182

Error messages After run to mirror maker 2 on B side node,  
Note: Kafka and zookeeper services has been runned properly on A and B side nodes

[2022-08-18 10:19:49,595] WARN The configuration ‘offset.storage.replication.factor’ was supplied but isn’t a known config. (org.apache.kafka.clients.admin.AdminClientConfig:380)  
[2022-08-18 10:19:49,595] WARN The configuration ‘admin.sasl.jaas.config’ was supplied but isn’t a known config. (org.apache.kafka.clients.admin.AdminClientConfig:380)  
[2022-08-18 10:19:49,595] WARN The configuration ‘admin.bootstrap.servers’ was supplied but isn’t a known config. (org.apache.kafka.clients.admin.AdminClientConfig:380)  
[2022-08-18 10:19:49,596] INFO Kafka version: 2.8.0 (org.apache.kafka.common.utils.AppInfoParser:119)  
[2022-08-18 10:19:49,596] INFO Kafka commitId: ebb1d6e21cc92130 (org.apache.kafka.common.utils.AppInfoParser:120)  
[2022-08-18 10:19:49,596] INFO Kafka startTimeMs: 1660807189595 (org.apache.kafka.common.utils.AppInfoParser:121)  
[2022-08-18 10:20:19,600] INFO [AdminClient clientId=adminclient-1] Metadata update failed (org.apache.kafka.clients.admin.internals.AdminMetadataManager:235)  
org.apache.kafka.common.errors.TimeoutException: Call(callName=fetchMetadata, deadlineMs=1660807219597, tries=1, nextAllowedTryMs=0) timed out at 1660807219599 after 1 attempt(s)  
Caused by: org.apache.kafka.common.errors.DisconnectException: Cancelled fetchMetadata request with correlation id 1 due to node -1 being disconnected  
[2022-08-18 10:20:49,601] INFO [AdminClient clientId=adminclient-1] Metadata update failed (org.apache.kafka.clients.admin.internals.AdminMetadataManager:235)  
org.apache.kafka.common.errors.TimeoutException: Call(callName=fetchMetadata, deadlineMs=1660807249599, tries=1, nextAllowedTryMs=1660807249701) timed out at 1660807249601 after 1 attempt(s)  
Caused by: org.apache.kafka.common.errors.DisconnectException: Cancelled fetchMetadata request with correlation id 3 due to node -1 being disconnected  
[2022-08-18 10:20:49,606] INFO App info kafka.admin.client for adminclient-1 unregistered (org.apache.kafka.common.utils.AppInfoParser:83)  
[2022-08-18 10:20:49,606] INFO [AdminClient clientId=adminclient-1] Metadata update failed (org.apache.kafka.clients.admin.internals.AdminMetadataManager:235)  
org.apache.kafka.common.errors.TimeoutException: Call(callName=fetchMetadata, deadlineMs=1660807279601, tries=1, nextAllowedTryMs=-9223372036854775709) timed out at 9223372036854775807 after 1 attempt(s)  
Caused by: org.apache.kafka.common.errors.TimeoutException: The AdminClient thread has exited. Call: fetchMetadata  
[2022-08-18 10:20:49,612] INFO Metrics scheduler closed (org.apache.kafka.common.metrics.Metrics:659)  
[2022-08-18 10:20:49,612] INFO Closing reporter org.apache.kafka.common.metrics.JmxReporter (org.apache.kafka.common.metrics.Metrics:663)  
[2022-08-18 10:20:49,612] INFO Metrics reporters closed (org.apache.kafka.common.metrics.Metrics:669)  
[2022-08-18 10:20:49,612] ERROR Stopping due to error (org.apache.kafka.connect.mirror.MirrorMaker:313)  
org.apache.kafka.connect.errors.ConnectException: Failed to connect to and describe Kafka cluster. Check worker’s broker connection and security properties.  
at org.apache.kafka.connect.util.ConnectUtils.lookupKafkaClusterId(ConnectUtils.java:70)  
at org.apache.kafka.connect.util.ConnectUtils.lookupKafkaClusterId(ConnectUtils.java:51)  
at org.apache.kafka.connect.mirror.MirrorMaker.addHerder(MirrorMaker.java:236)  
at java.lang.Iterable.forEach(Iterable.java:75)  
at org.apache.kafka.connect.mirror.MirrorMaker.(MirrorMaker.java:137)  
at org.apache.kafka.connect.mirror.MirrorMaker.(MirrorMaker.java:149)  
at org.apache.kafka.connect.mirror.MirrorMaker.main(MirrorMaker.java:300)  
Caused by: java.util.concurrent.ExecutionException: org.apache.kafka.common.errors.TimeoutException: Call(callName=listNodes, deadlineMs=1660807249602, tries=1, nextAllowedTryMs=1660807249705) timed out at 1660807249605 after 1 attempt(s)  
at org.apache.kafka.common.internals.KafkaFutureImpl.wrapAndThrow(KafkaFutureImpl.java:45)  
at org.apache.kafka.common.internals.KafkaFutureImpl.access$000(KafkaFutureImpl.java:32)  
at org.apache.kafka.common.internals.KafkaFutureImpl$SingleWaiter.await(KafkaFutureImpl.java:89)  
at org.apache.kafka.common.internals.KafkaFutureImpl.get(KafkaFutureImpl.java:260)  
at org.apache.kafka.connect.util.ConnectUtils.lookupKafkaClusterId(ConnectUtils.java:64)  
… 6 more  
Caused by: org.apache.kafka.common.errors.TimeoutException: Call(callName=listNodes, deadlineMs=1660807249602, tries=1, nextAllowedTryMs=1660807249705) timed out at 1660807249605 after 1 attempt(s)  
Caused by: org.apache.kafka.common.errors.TimeoutException: Timed out waiting for a node assignment. Call: listNodes