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content/operate/rs/release-notes/rs-6-4-2-releases/rs-6-4-2-81.md

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This is a maintenance release for ​​Redis Enterprise Software version 6.4.2.

The following table shows the MD5 checksums for the available packages:

PackageMD5 checksum (6.4.2-81 June release)
Ubuntu 1631631248672de0154ec20aee0bff9adc
Ubuntu 18eb4e8c1bc1443923ebcd457e51684f7e
Ubuntu 201256292b8dca6456e69dc309be51a8d0
RedHat Enterprise Linux (RHEL) 7
Oracle Enterprise Linux (OL) 71e51c5fdf22c0b6988565444ba08c6cd
RedHat Enterprise Linux (RHEL) 8
Oracle Enterprise Linux (OL) 8
Rocky Enterprise Linux96dc036339fe18fb218e8d4c8ff50c99
Amazon Linux 21a549bdb360c9e22ef764faeadbd4c90

New features and enhancements

  • RS77279 - Database backup failures and replica high availability ([replica HA]({{< relref "/operate/rs/databases/configure/replica-ha" >}})) failures (for example, when relocating a shard from a node) now generate email alerts

Redis Stack v6.2.6

Redis Enterprise Software v6.4.2 includes the new features delivered in the latest Redis Stack release (6.2.6 v6):

  • [RediSearch v2.6.9]({{< relref "/operate/oss_and_stack/stack-with-enterprise/search" >}})

  • [RedisJSON v2.4.7]({{< relref "/operate/oss_and_stack/stack-with-enterprise/json" >}})

  • [RedisBloom v2.4.5]({{< relref "/operate/oss_and_stack/stack-with-enterprise/bloom" >}})

  • [RedisGraph v2.10.9]({{< relref "/operate/oss_and_stack/stack-with-enterprise/deprecated-features/graph" >}})

  • [RedisTimeSeries v1.8.10]({{< relref "/operate/oss_and_stack/stack-with-enterprise/timeseries" >}})

See [Upgrade modules]({{< relref "/operate/oss_and_stack/stack-with-enterprise/install/upgrade-module" >}}) to learn how to upgrade a module for a database.

Resolved issues

  • RS101204 - Fixed high memory consumption that was caused by the persistence_mgr service when AOF persistence is configured for every second.

  • RS39322 , RS35526 - [rlcheck]({{< relref "/operate/rs/references/cli-utilities/rlcheck" >}}) no longer requires root privileges and can run with the redislabs group and user.

  • RS97315, RS100853 - Fixed the robustness of the support package process when collecting the shard configuration.

  • RS65110 - Fixed firewalld SELinux configuration.

  • RS101691 - Clean false error messages at the end of installation.

Known limitations

Feature limitations

  • RS78430 - When [tuning module arguments]({{< relref "/operate/rs/references/cli-utilities/rladmin/tune#tune-db" >}}), typos or unsupported arguments can cause shards to get stuck after restarting.

  • RS40641 - API requests are redirected to an internal IP in case the request arrives from a node which is not the master. To avoid this issue, use [rladmin cluster config]({{< relref "/operate/rs/references/cli-utilities/rladmin/cluster/config" >}}) to configure handle_redirects or handle_metrics_redirects.

Operating system limitations

Ubuntu 20.04

By default, you cannot use the SHA1 hash algorithm (OpenSSL’s default security level is set to 2). The operating system will reject SHA1 certificates even if the mtls_allow_weak_hashing option is enabled. You need to replace SHA1 certificates with newer certificates that use SHA-256. Note that the certificates provided with Redis Enterprise Software use SHA-256.