Kafka Zookeeper A Zookeeper operation took too long to complete.

The operation may be experiencing performance issues or the timeout setting is too low.

Understanding Kafka Zookeeper

Apache Kafka is a distributed event streaming platform used by thousands of companies for high-performance data pipelines, streaming analytics, data integration, and mission-critical applications. Zookeeper is a centralized service for maintaining configuration information, naming, providing distributed synchronization, and providing group services. It is a critical component of Kafka that helps manage the distributed nature of Kafka brokers.

Identifying the Symptom: Operation Timeout

When working with Kafka Zookeeper, you might encounter an OPERATION_TIMEOUT error. This error indicates that a Zookeeper operation has taken longer than expected to complete. This can manifest as delayed responses or failures in Kafka operations that rely on Zookeeper for coordination.

Exploring the Issue: OPERATION_TIMEOUT

The OPERATION_TIMEOUT error is typically a result of a Zookeeper operation exceeding the configured timeout period. This can happen due to network latency, overloaded Zookeeper nodes, or inefficient operations that take longer to process. Understanding the root cause is crucial to resolving this issue effectively.

Common Causes of OPERATION_TIMEOUT

Network Latency: High latency between Kafka brokers and Zookeeper nodes can lead to timeouts.
Overloaded Zookeeper Nodes: If Zookeeper nodes are handling too many requests, they may not respond in a timely manner.
Configuration Issues: Incorrect timeout settings can lead to premature timeouts.

Steps to Resolve OPERATION_TIMEOUT

To address the OPERATION_TIMEOUT issue, follow these steps:

1. Review and Optimize Zookeeper Configuration

Check the Zookeeper configuration files for timeout settings. The zookeeper.session.timeout.ms and zookeeper.connection.timeout.ms are critical parameters. Consider increasing these values if they are too low.

zookeeper.session.timeout.ms=30000 zookeeper.connection.timeout.ms=30000

For more information on Zookeeper configuration, refer to the Zookeeper Administrator's Guide.

2. Monitor Network Latency

Use network monitoring tools to check for latency issues between Kafka brokers and Zookeeper nodes. Tools like PingPlotter or Wireshark can help identify network bottlenecks.

3. Scale Zookeeper Cluster

If Zookeeper nodes are overloaded, consider scaling the cluster by adding more nodes. This can distribute the load more evenly and reduce the likelihood of timeouts.

4. Optimize Zookeeper Operations

Review the operations being performed on Zookeeper. Ensure that they are efficient and not causing unnecessary load. Consider batching operations or optimizing queries to reduce the time taken for each operation.

Conclusion

By understanding the root causes of the OPERATION_TIMEOUT error and following the steps outlined above, you can effectively resolve this issue and ensure smooth operation of your Kafka and Zookeeper setup. Regular monitoring and optimization are key to maintaining a healthy distributed system.

Never debug

Kafka Zookeeper

manually again

Let Dr. Droid create custom investigation plans for your infrastructure.

Start Free POC (15-min setup) →

Automate Debugging for

Kafka Zookeeper

See how Dr. Droid creates investigation plans for your infrastructure.

Start Free POC →

MORE ISSUES

Kafka Zookeeper Configuration mismatch detected between Zookeeper nodes.

Inconsistent configuration settings across Zookeeper nodes.

Kafka Zookeeper An invalid event type was encountered in Zookeeper.

The application is not handling all possible event types emitted by Zookeeper.

Kafka Zookeeper SERVER_OVERLOADED

The Zookeeper server is overloaded with requests.

Kafka Zookeeper Inconsistent metadata detected in Zookeeper.

Configuration errors or unsynchronized nodes.

Kafka Zookeeper An exception occurred while processing a watcher event.

The watcher implementation may have errors or may not handle all cases.

Kafka Zookeeper Client disconnected from the Zookeeper server unexpectedly.

Network instability or client misconfiguration.

Kafka Zookeeper Failed to create a node in Zookeeper.

Ensure the parent node exists and check for permission issues.

Kafka Zookeeper An unexpected exception occurred in Zookeeper.

An unexpected exception can be caused by misconfigurations, network issues, or resource limitations.

Kafka Zookeeper CLIENT_TIMEOUT

The client timed out waiting for a response from Zookeeper.

Kafka Zookeeper The Zookeeper client is in an invalid state.

The Zookeeper client is in an invalid state.

Kafka Zookeeper DATA_TOO_LARGE error encountered when trying to write data to a Zookeeper node.

The data for a node exceeds the maximum allowed size.

Kafka Zookeeper SASL authentication failed for a Zookeeper client.

SASL configuration and credentials might be incorrect.

Kafka Zookeeper Failed to delete a node in Zookeeper.

The node is being accessed or has children nodes.

Kafka Zookeeper Zookeeper nodes are isolated and unable to communicate with each other.

A network partition has occurred, isolating Zookeeper nodes.

Kafka Zookeeper INVALID_CONFIG

Invalid configuration settings for Zookeeper.

Kafka Zookeeper CLIENT_CLOSED

The Zookeeper client was closed unexpectedly.

Kafka Zookeeper An unsupported operation was attempted on Zookeeper.

The operation is not supported by the current Zookeeper version.

Kafka Zookeeper Corruption detected in Zookeeper transaction logs.

Kafka Zookeeper Zookeeper Atomic Broadcast protocol error encountered.

Network issues or misconfiguration among Zookeeper nodes.

Kafka Zookeeper Zookeeper server is in read-only mode.

Zookeeper server is in read-only mode due to inability to achieve quorum.

Kafka Zookeeper Leader election process failed in the Zookeeper ensemble.

Leader election failure can occur due to network issues, misconfiguration, or node failures.

Kafka Zookeeper Failed to create or load a snapshot in Zookeeper.

Disk space issues or permission problems in the snapshot directory.

Kafka Zookeeper UNRESPONSIVE_FOLLOWER

A follower node is not responding in the Zookeeper ensemble.

Kafka Zookeeper JUTE_MAXBUFFER_EXCEEDED

The request exceeds the maximum buffer size.

Kafka Zookeeper WATCH_LIMIT_EXCEEDED error encountered in Kafka Zookeeper.

The client has exceeded the limit for registered watchers.

Kafka Zookeeper SERVER_SHUTDOWN

The Zookeeper server is shutting down.

Kafka Zookeeper INVALID_SESSION error encountered when interacting with Kafka Zookeeper.

The session ID is invalid or has been closed.

Kafka Zookeeper ACL_NOT_FOUND

The specified ACL was not found for the node.

Kafka Zookeeper An invalid callback was specified for a Zookeeper operation.

The callback function provided to a Zookeeper operation is not implemented correctly or is not registered properly.

Kafka Zookeeper WATCHER_REMOVED

A watcher was removed due to session expiration or disconnection.

Kafka Zookeeper Attempting to delete a node in Zookeeper results in a NODE_NOT_EMPTY error.

The node being deleted has child nodes, which prevents its deletion.

Kafka Zookeeper The client has exceeded the limit for ephemeral nodes.

The client is creating more ephemeral nodes than allowed by the Zookeeper configuration.

Kafka Zookeeper DISK_FULL error encountered in Kafka Zookeeper.

The disk used by Zookeeper is full.

Kafka Zookeeper INVALID_PATH error encountered when trying to access or create a Zookeeper node.

An invalid path was specified for a Zookeeper node.

Kafka Zookeeper UNSUPPORTED_VERSION error encountered when connecting to Zookeeper.

The client is using an unsupported version of the Zookeeper protocol.

Kafka Zookeeper SYNC_FAILED error encountered during a sync operation.

A sync operation failed to complete due to network issues or misconfigurations.

Kafka Zookeeper TOO_MANY_CONNECTIONS

Too many client connections to Zookeeper.

Kafka Zookeeper CONNECTION_TIMEOUT

The connection to the Zookeeper server timed out.

Kafka Zookeeper Zookeeper server ran out of memory.

Zookeeper server ran out of memory due to insufficient memory allocation or inefficient memory usage.

Kafka Zookeeper QUORUM_LOSS

The Zookeeper ensemble has lost quorum.

Kafka Zookeeper LEADER_NOT_FOUND

The Zookeeper ensemble cannot determine the leader.

Kafka Zookeeper Zookeeper server is not serving requests.

Zookeeper server is not properly configured or running.

Kafka Zookeeper Data inconsistency detected across Zookeeper nodes.

Data inconsistency in Zookeeper can occur due to network partitions, node failures, or improper configuration.

Kafka Zookeeper A Zookeeper operation took too long to complete.

The operation may be experiencing performance issues or the timeout setting is too low.

Kafka Zookeeper SESSION_MOVED

The session has moved to a different server.

Kafka Zookeeper INVALID_ACL error encountered when accessing a Zookeeper node.

An invalid ACL was specified for a node.

Kafka Zookeeper NO_NODE error encountered when attempting an operation on a Zookeeper node.

An operation was attempted on a node that does not exist.

Kafka Zookeeper CONNECTION_LOSS

The client lost its connection to the Zookeeper server.

Kafka Zookeeper SESSION_EXPIRED

The client's session with Zookeeper has expired.

Kafka Zookeeper Authentication with Zookeeper failed.

Incorrect authentication credentials or misconfiguration.

Kafka Zookeeper Encountering NODE_EXISTS error when trying to create a node in Zookeeper.

An attempt was made to create a node that already exists.

Backed by

Platform

Resources

Contact

Connect

Made with ❤️ in & 🏢

Doctor Droid