GridGain 9.1.7 Release Notes

Overview

GridGain 9.1.7 is a release with multiple minor improvements, including better support for bootstrap implementations and extended cluster monitoring.

Major Changes

Extended Bootstrap Support

This release features extended backwards compatibility support for bootstrap configuration. You can now use docker compose files without providing explicit bootstrap file. This ensures compatibility with compose files created for all previous versions.

Extended Critical Worker Timeouts

This release increases default timeout values for critical workers. The following values are changed:

ignite.system.criticalWorkers.livenessCheckIntervalMillis changed from 200 to 2000 milliseconds,
ignite.system.criticalWorkers.maxAllowedLagMillis changed from 500 to 5000 milliseconds,
ignite.system.criticalWorkers.nettyThreadsHeartbeatIntervalMillis changed from 100 to 1000 milliseconds.

New Features

Improved Monitoring

This release features multiple improvements to cluster monitoring:

New ClockSkewExceedingMaxClockSkew metric can be used to monitor clock drift.
A set of new compute events allows for easier monitoring of your distributed computing jobs.

Improved Migration Tools

This release features major changes in migration tools:

A new way of configuring mapping between caches and tables during DCR from GridGain 8 was added. By using it, you can map key and value cache fields separately, as well as ignore the fields that are not required. The example below shows how you can configure mapping:

dr-service-config = {
  cacheMapping = [
    {
      cache = "cacheName"
      table = "schemaName.tableName"
      keyFields = [
        { field = "K1", column = "COL_1" }
      ]
      valueFields = [
        { field = "K1", column = "COL_2" }
        { field = "V4", ignore = true }
      ]
    }
  ]
}

Code adapter now supports migration of GridGain 8 ScanQueries.

Windows Support for C++ Client

With this release, you can use the C++ client on Windows systems with MSVC toolchain versions 2017, 2019 and 2022.

Improvements and Fixed Issues

Issue ID	Category	Description
IGN-28576	General	Fixed a possible memory leak in event sink.
IGN-28535	General	Increased default timeouts for critical workers.
IGN-28529	Cluster SQL Engine	Improved the performance of SQL LEFT JOIN queries with non-equal predicates.
IGN-28527	Cluster Storage Engine	Improved log information about possible thread blocking.
IGN-28452	Cluster Storage Engine	Added a new metric for clock drift.
IGN-28451	General	Warning is now printed to log when MAX_CLOCK_SKEW value is exceeded.
IGN-28447	Distributed Computing	Added compute job events.
IGN-28284	Cluster SQL Engine	Fixed output formatting for CAST AS VARCHAR FORMAT queries.
IGN-27447	Platforms and Clients	Updated Netty from version 4.1.119.Final to version 4.2.4.Final.
GG-44820	Cluster Storage Engine	BOOTSTRAP_NODE_CONFIG variable is no longer required to start GridGain via docker compose.
GG-44646	Cluster Storage Engine	Updated RocksDB to version 10.2.1.
GG-44644	Cluster SQL Engine	Added an ability to configure complex data mapping during data migration from GridGain 8.
GG-44631	Cluster Storage Engine	Updated RocksDB to version 10.2.1.
GG-44330	Cluster Data Snapshots and Recovery	Requesting a snapshot for a future timestamp now gets rejected.
GG-44067	Cluster Continuous Queries	Added ContinuousQueryOptions.partitions option to query only certain partitions.
GG-43906	Cluster Deployment	Added KEDA configuration to Helm chart.
GG-43854	Platforms & Thin Clients	Python Client: Introduced Heartbeats.
GG-43256	Cluster Continuous Queries	C++: Added watermark API to the CQ event batches. Added options to process empty batches.
GG-39659	Migration Tools	Added support for ScanQueries in GridGain 8 code adapter.

Issue ID

Upgrade Information

You can upgrade to current GridGain version from previous releases. Below is a list of versions that are compatible with the current version. Compatibility with other versions is not guaranteed. If you are on a version that is not listed, contact GridGain for information on upgrade options.

9.1.0, 9.1.1, 9.1.2, 9.1.3, 9.1.4, 9.1.5, 9.1.6

Known Limitations

Data Restoration After Data Rebalance

Currently, data rebalance may cause partition distribution to change and cause issues with snapshots and data recovery. In particular:

It is currently not possible to restore a LOCAL snapshot if data rebalance happened after snapshot creation. This will be addressed in one of the upcoming releases.
It is currently not possible to perform point-in-time recovery if data rebalance happened after table creation. This will be addressed in one of the upcoming releases.

SQL Performance in Complex Scenarios

There are known issues with the performance of SQL read-write transactions in complex read-write scenarios. These issues will be addressed in an upcoming releases.

We Value Your Feedback

Your comments and suggestions are always welcome. You can reach us here: http://support.gridgain.com/.

© 2025 GridGain Systems, Inc. All Rights Reserved. Privacy Policy | Legal Notices. GridGain® is a registered trademark of GridGain Systems, Inc.
Apache, Apache Ignite, the Apache feather and the Apache Ignite logo are either registered trademarks or trademarks of The Apache Software Foundation.

Last updated on Sep 29, 2025