The following lists fixes and enhancements in the 2.6.2 release.
Broker
[Broker] Catch throwable when start pulsar 7221
[Broker] Protobuf-shaded package can not update version 7228
[Broker] Check for null arguments in Namespaces Rest API 7247
[Broker] Handle SubscriptionBusyException in resetCursor api 7335
[Broker] Converted the namespace bundle unload into async operation 7364
[Broker] Update Jersey to 2.31 7515
[Broker] Stop to dispatch when skip message temporally since Key_Shared consumer stuck on delivery 7553
[Broker] Fix bug where producer for geo-replication is not closed when topic is unloaded 7735
[Broker] Make resetting cursor in REST API asynchronous 7744
[Broker] Reestablish namespace bundle ownership from false negative releasing and false positive acquiring 7773
[Broker] make pulsar executor pool size configurable 7782
[Broker] Redirect Get message by id request when broker not serve for the topic 7786
[Broker] Make zk cache executor thread pool size configurable 7794
[Broker] Implement toString() method for TopicMessageIdImpl class 7807
[Broker] Fix pending batchIndexAcks bitSet batchSize in PersistentAcknowledgmentsGroupingTracker 7828
[Broker] Fix deadlock when adding consumer 7841
[Broker] Split message ranges by ledger ID and store them in individualDeletedMessages 7861
[Broker] Fix pulsar metrics providing wrong information 7905
[Broker] Don't fail the health check request when trying to delete the previous subscription 7906
[Broker] Add configuration to set number of channels per bookie 7910
[Broker] Fix publish buffer of one ServerCnx calculated multi-times when check broker's publish buffer 7926
[Broker] Add some logging to improve Authentication debugging and Fix typos in code "occured" -> "occurred" 7934
[Broker] Fix NPE when acknowledge messages at the broker side 7937
[Broker] Fix the wrong issuer url concatenate 7980
[Broker] Upgrade the snakeyaml version to 1.26 7994
[Broker] Exclude vertx from bookkeeper-http package 7997
[Broker] Check null point before setting auto read 7999
[Broker] Fix IndexOutOfBoundsException in the KeyShared subscription when dispatching messages to consumers 8024
[Broker] Upgrade jetty-util version to 9.4.31 8035
[Broker] Add replicated check to checkInactiveSubscriptions 8066
[Broker] Add get-last-message-id admin for v1 api 8081
[Broker] Fix client lookup hangs when broker restarts 8101
[Broker] Should not cache the owner that does not belong to current server 8111
[Broker] Support to specify multi ipv6 hosts in brokerServiceUrl 8120
[Broker] Intercept messages to consumers and add intercept exception 8129
[Broker] Add ChannelFutures utility class to pulsar-common 8137
[Broker] Support Disable Replicated Subscriptions 8144
[Broker] Fix error code returned to client when service unit is not ready 8147
[Broker] Skip intercepting multipart requests 8156
[Broker] Enable intercept filters only when interceptors are configured 8157
[Broker] Clean inactive non-persistent subscriptions 8166
[Broker] Add a new state for namespace-level TTL 8178
[Broker] Fix peek messages failed with subscriptionName not exist 8182
[Broker] Fix pulsar service close exception 8197
[Broker] Use ThreadPoolExecutor instead of EventLoop 8208
[Broker] Close ZK connections at end of metadata setup 8228
[Broker] Delete associated ledgers before deleting cluster metadata 8244
[Broker] Fix stuck lookup operations when the broker is starting up 8273
[Broker] Fix Broker enters an infinite loop in ManagedLedgerImpl.asyncReadEntries 8284
[Broker] Fix message TTL on Key_Shared subscription and Fix ordering issue when replay messages 8292
[Broker] Fix race condition in updating readPosition in ManagedCursorImpl 8299
[Broker] Refresh ZooKeeper-data cache in background to avoid deadlock and blocking IO on ZK thread 8304
[Broker] Upgrade hdfs2 version to 2.8.5 8319
[Broker] Upgrade solr version to 8.6.3 8328
[Broker] Fix deadlock that occurred during topic ownership check 8406
Proxy
[Proxy] Add advertisedAddress config field to ProxyConfiguration 7542
[Proxy] Fix deadlock in pulsar proxy 7690
[Proxy] Handle NPE while updating proxy stats 7766
[Proxy] Fix the null exception when starting the proxy service 8019
[Proxy] Add proxy plugin interface to support user defined additional servlet 8067
Pulsar SQL
[Pulsar SQL] Upgrade Presto version to 332 7194
[Pulsar SQL] Replace com.ning.asynchttpclient with org.asynchttpclient 8099
Java Client
[Java Client] Support input-stream for trustStore cert 7442
[Java Client] Avoid subscribing the same topic again 7823
[java Client] Add autoPartitionsUpdateInterval for producer and consumer 7840
[Java Client] Avoid resolving address for sni-host + thread-safe connection creation 8062
[Java Client] Websocket interface decode URL encoding 8072
[Java Client] Always use SNI for TLS enabled Pulsar Java broker client 8117
[Java Client] Improve timeout handling in ClientCnx to cover all remaining request types (GetLastMessageId, GetTopics, GetSchema, GetOrCreateSchema) 8149
[Java Client] Fix ConsumerImpl memory leaks 8160
[Java Client] Fix issue where paused consumer receives new message when reconnecting 8165
[Java Client] Improve refactored client connection code 8177
[Java Client] Add log level configuration in pulsar-client 8195
[Java Client] Remove unnecessary locks 8207
[Java Client] Fix AutoUpdatePartitionsInterval setting problem 8227
[Java Client] Add read position when joining in the consumer stats 8274
[Java Client] Support reset cursor to a batch index of the batching message 8285
[Java Client] Support exclude the message when reset cursor by message ID 8306
[Java Client] Increasing timeout for pulsar client io threads to shutdown 8316
[Java Client] Support cancelling message & batch futures returned from Reader & Consumer 8326
[Java Client] Disable batch receive timer for Readers 8381
[Java Client] Fix pause does not work for new created consumer 8387
CPP Client
[CPP Client] Wait for all seek operations completed 7216
[CPP Client] Ensure parallel invocations of MultiTopicsConsumerImpl::subscribeAsync with the same topic name do not produce an error. 7691
[CPP Client] Throw std::exception types 7798
[CPP Client] Make clear() thread-safe 7862
[CPP Client] Support key based batching 7996
[CPP Client] The token endpoint should get from the well-known configuration 8006
[CPP Client] Add Snappy library to Docker images for building C++ packages 8086
[CPP Client] Add epoch for C++ client HandleBase to handle create producer timeout 8191
[CPP Client] Fix some pending requests may never complete when broker's down 8232
[CPP Client] Client is allocating buffer bigger than needed 8283
[CPP Client] Client back-pressure is done on batches rather than number of messages 8331
[CPP Client] Fix message id error when subscribing a single partition 8341
Python Client
[Python Client] Add python schema field default value 8122
[Python Client] Expose schema version (of writerSchema) in Message 8173
Pulsar Functions
[Pulsar Functions] During Function update, cleanup should only happen for temp files that were generated 7201
[Pulsar Functions] Have metadata tailer use its own thread for processing 7211
[Pulsar Functions] Allow kubernetes runtime to customize function instance class path 7844
[Pulsar Functions] SinkRecord adds an overridden method 8038
[Pulsar Functions] Set dryrun of KubernetesRuntime is null 8064
[Pulsar Functions] Allow disabling forwarding source message properties 8158
[Pulsar Functions] Missed dryRun on maintenance of secrets 8286
Pulsar Perf
[Pulsar Perf] Support setting message key 7989
[Pulsar Perf] Make pulsar-perf ioThread number configurable 8090
Pulsar Admin
[Pulsar Admin] Support initial namespace of the cluster without startup the broker 7434
[Pulsar Admin] Fix some params on consumer broken by #4400 (regex, initialSouscriptionPosition) 7795
[Pulsar Admin] Return more informative error message when trying to create subscription on non-persistent through Rest API or pulsar-admin CLI 7831
[Pulsar Admin] Add cli command to get last message Id 8082
[Pulsar Admin] Support delete all data associated with a cluster 8133
[Pulsar Admin] Support delete schema ledgers when delete topics 8167
[Pulsar Admin] Add command to delete a cluster's metadata from ZK 8169
[Pulsar Admin] Support reset cursor to a batch index for Pulsar Admin 8329
Tiered Storage
[Tiered Storage] Refactored JCloud Tiered Storage 6335
[Tiered Storage] Remove duplicate updates 8198
[Tiered Storage] Make the field name in OffloadPolicies match with config file 8310