Azure/azure-sdk-for-java com.azure+azure-cosmos_4.80.0

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4.80.0 (2026-05-01)

Features Added

• Added support for Query Advisor feature - See 48160
• Added additionalHeaders support to allow setting additional headers (e.g., x-ms-cosmos-workload-id) that are sent with every request. - See PR 48128
• Added IGNORE_UNKNOWN_RNTBD_TOKENS SDK capability flag and propagated SDK supported capabilities to barrier requests, enabling N-Region Synchronous Commit to function correctly with backends that return new RNTBD response tokens. - See PR 48965
• Added support for change feed with startFrom point-in-time on merged partitions by enabling the CHANGE_FEED_WITH_START_TIME_POST_MERGE SDK capability. - See PR 48752
• Added new readManyByPartitionKeys API on CosmosAsyncContainer / CosmosContainer to bulk-query all documents matching a list of partition key values with better efficiency than issuing individual queries. See PR 48801
• Added CosmosReadManyByPartitionKeysRequestOptions - a dedicated request-options type for readManyByPartitionKeys that exposes setContinuationToken(String) for resuming previous invocations and setMaxConcurrentBatchPrefetch(int) to bound per-call prefetch parallelism. See PR 48801
• Added CosmosReadManyByPartitionKeysRequestOptions.setMaxBatchSize(Integer) to set the max. number of partition keys used for a single batch. See PR 48930
• Added getCustomItemSerializer() to CosmosRequestContext and setCustomItemSerializer(CosmosItemSerializer) to CosmosRequestOptions to allow overriding the custom item serializer via operation policies. - See PR 48963

Bugs Fixed

• Fixed readMany and readAllItems returning incorrect results on containers whose partition key path is nested (e.g. /address/city) due to malformed selector generation. - See PR 48801
• Fixed an issue where the throughput control throughputQueryMono was always subscribed even when targetThroughput is used (not targetThroughputThreshold), causing unnecessary throughputSettings/read permission requirement for AAD principals. - See PR 48800
• Fixed JVM <clinit> deadlock when multiple threads concurrently trigger Cosmos SDK class loading for the first time. - See PR 48689
• Fixed an issue where CustomItemSerializer was incorrectly applied to internal SDK query pipeline structures (e.g., OrderByRowResult, Document), causing deserialization failures in ORDER BY, GROUP BY, aggregate, DISTINCT, and hybrid search queries. - See PR 48811
• Fixed an issue where SqlParameter ignored the configured CustomItemSerializer, always using the internal default serializer instead. - See PR 48811
• Fixed a ClientTelemetry static initialization failure when IMDS access is disabled, preventing NoClassDefFoundError during Cosmos client creation in non-Azure environments. - See PR 48888
• Fixed an issue where Netty could log "An exceptionCaught() event was fired, and it reached at the tail of the pipeline" on HTTP/2 connections when the server resets idle TCP connections by adding an exception handler on the HTTP/2 parent channel to handle these connection-level exceptions more appropriately. - See PR 48890
• Fixed an issue where CustomItemSerializer configured on CosmosClientBuilder was not honored for response deserialization in CosmosAsyncContainer.upsertItem when no request-level serializer was set. - See PR 48962