[GitHub] [pulsar] eolivelli commented on a change in pull request #11598: [Blog] Add 2.7.3 announcement blog

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eolivelli commented on a change in pull request #11598:
URL: https://github.com/apache/pulsar/pull/11598#discussion_r685059307



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File path: site2/website/blog/2021-08-xx-Apache-Pulsar-2-7-3.md
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+---
+author: Bo Cong, Anonymitaet
+title: Apache Pulsar 2.7.3
+---
+
+# What’s New in Apache Pulsar 2.7.3
+
+The Apache Pulsar community releases version 2.7.3! 34 contributors provided improvements and bug fixes that delivered 79 commits.
+
+## Highlights
+
+- Cursor reads adhere to the dispatch byte rate limiter setting and no longer cause unexpected results. [PR-11249](https://github.com/apache/pulsar/pull/11249)
+
+- The ledger rollover scheduled task runs as expected. [PR-11226](https://github.com/apache/pulsar/pull/11226)
+
+This blog walks through the most noteworthy changes. For the complete list including all enhancements and bug fixes, check out the Pulsar 2.7.3 Release Notes.
+
+# Notable bug fixes and enhancements
+
+## Broker
+
+### Cursor reads adhere to the dispatch byte rate limiter setting. [PR-9826](https://github.com/apache/pulsar/pull/9826)
+
+- **Issue**: When using byte rates, the dispatch rates were not respected (regardless
+of being a namespace or topic policy). 
+
+- **Resolution**: Fixed behavior of dispatch byte rate limiter setting. Cursor reads adhere to the setting and no longer cause unexpected results. 
+
+### The ledger rollover scheduled task runs as expected. [PR-11226](https://github.com/apache/pulsar/pull/11226)
+
+- **Issue**: Previously, the ledger rollover scheduled task was executed before reaching the ledger maximum rollover time, which caused the ledger not to roll over in time. 
+
+- **Resolution**: Fixed the timing of the ledger rollover schedule, so the task runs only after the ledger is created successfully. 
+  
+### The topic-level retention policy works correctly when restarting a broker. [PR-11136](https://github.com/apache/pulsar/pull/11136)
+
+- **Issue**: Previously, when setting a topic-level retention policy for a topic and then restarting the broker, the topic-level retention policy did not work.
+
+- **Resolution**: Fixed behavior of the policy so it replays all policy messages after initiating `policyCacheInitMap` and added a retention policy check test when restarting the broker.
+
+### The lastMessageId API call no longer causes a memory leak. [PR-10977](https://github.com/apache/pulsar/pull/10977)
+
+- **Issue**: Previously, there was a memory leak when calling the `lastMessageId` API, which caused the broker process to be stopped by Kubernetes. 
+
+- **Resolution**: Added the missing entry.release() call to PersistentTopic.getLastMessageId to ensure the broker does not run out of memory. 
+
+### ZooKeeper reads are cached by brokers. [PR-10594](https://github.com/apache/pulsar/pull/10594)
+
+- **Issue**: When performing the admin operation to get the namespace of a tenant, ZooKeeper reads were issued on the ZooKeeper client and not getting cached by the brokers.
+
+- **Resolution**: Fixed ZooKeeper caching when fetching a list of namespaces for a tenant.
+
+### Monitoring threads that call `LeaderService.isLeader()` are no longer blocked. [PR-10512](https://github.com/apache/pulsar/pull/10512)
+
+- **Issue**:  When `LeaderService` changed leadership status, it was locked with a `synchronized` block, which also blocked other threads calling `LeaderService.isLeader()`. 
+  
+- **Resolution**: Fixed the deadlock condition on the monitoring thread so it is not blocked by `LeaderService.isLeader() by modifying `ClusterServiceCoordinator` and `WorkerStatsManager` to check if it is a leader from `MembershipManager`. 
+
+### `hasMessageAvailable` can read messages successfully. [PR-10414](https://github.com/apache/pulsar/pull/10414)
+
+- **Issue**: When `hasMessageAvailableAsync` returned `true`, it could not read messages because messages were filtered by `acknowledgmentsGroupingTracker`. 
+
+- **Resolution**: Fixed the race conditions by modifying `acknowledgmentsGroupingTracker` to filter duplicate messages, and then cleanup the messages when the connection is open.
+  
+## Proxy
+
+### Proxy supports creating partitioned topics automatically. [PR-8048](https://github.com/apache/pulsar/pull/8048)
+
+- **Issue**: Proxies were not creating partitions because they were using the current ZooKeeper metadata.
+
+- **Resolution**: Changed the proxy to handle `PartitionMetadataRequest` by selecting and fetching from an available broker instead of using current ZooKeeper metadata.
+  
+## Pulsar admin
+
+### Flag added to indicate whether or not to create a metadata path on replicated clusters. [PR-11140](https://github.com/apache/pulsar/pull/11140)
+
+- **Issue**: When creating a partitioned topic in a replicated namespace, it did not
+create a metadata path `/managed-ledgers` on replicated clusters.
+
+- **Resolution**: Added a flag (createLocalTopicOnly) to indicate whether or not to create a metadata path for a partitioned topic in replicated clusters.
+
+### A topic policy can no longer be set for a non-existent topic. [PR-11131](https://github.com/apache/pulsar/pull/11131)
+
+- **Issue**: Due to a redirect loop in a topic policy, you can set a policy for a non-existing topic or a partition of a partitioned topic. 
+
+- **Resolution**: The fix added an authoritative flag for a topic policy to avoid a redirect loop. You can not set a topic policy for a non-existent topic or a partition of a partitioned topic. If you set a topic policy for a partition of a 0-partition topic, it redirects to the broker. 
+
+### Discovery service no longer hard codes the topic domain as persistent. [PR-10806](https://github.com/apache/pulsar/pull/10806)
+
+- **Issue**: When using the lookup discovery service for a partitioned non-persistent topic, it returned zero rather than the number of partitions. The Pulsar client tried to connect to the topic as if it were a normal topic.
+
+- **Resolution**: Implemented `topicName.getDomain().value()` rather than hard coding `persistent.` Now you can use the discovery service for a partitioned, non-persistent topic successfully.
+
+### Other connectors can now use the Kinesis `Backoff` class. [PR-10744](https://github.com/apache/pulsar/pull/10744)
+
+- **Issue**: The Kinesis sink connector `Backoff` class in the Pulsar client implementation project in combination  with the dependency `org.apache.pulsar:pulsar-client-original` increased the connector size. 
+
+- **Resolution**: Added a new class `Backoff` in the function io-core project so that the Kinesis sink connector and other connectors can use the class.
+
+## Client
+
+### A `FLOW` request with zero permits can not be sent. [PR-10506](https://github.com/apache/pulsar/pull/10506)
+
+- **Issue**: When a broker received a `FLOW` request with zero permits, an exception was thrown and then the connection was closed. This triggered frequent reconnections and caused duplicate or out-of-order messages. 
+  
+- **Resolution**: Added a validation that verifies the permits of a `FLOW` request before sending it. If the permit is zero, the `FLOW` request can not be sent.
+
+## Function and connector
+
+### The Kinesis sink connector acknowledges successful messages. [PR-10769](https://github.com/apache/pulsar/pull/10769)
+
+- **Issue**: The Kinesis sink connector did not acknowledge messages after they were sent successfully. 
+  
+- **Resolution**: Added acknowledgement for the Kinesis sink connector once a message is sent successfully. 
+ 
+## Docker
+
+### Function name length cannot exceed 52 characters when using Kubernetes runtime. [PR-10531](https://github.com/apache/pulsar/pull/10531)
+
+- **Issue**: When using Kubernetes runtime, if a function was submitted with a valid length (less than 55 characters), a StatefulSet was created but it was unable to spawn pods. 
+  
+- **Resolution**: Changed the maximum length of a function name from 55 to 53 characters for Kubernetes runtime. With this fix, the length of a function name can not exceed 52 characters. 
+
+## Dependency 
+
+### `pulsar-admin` connection to proxy is stable when TLS is enabled. [PR-10907](https://github.com/apache/pulsar/pull/10907)
+
+- **Issue**: `pulsar-admin` was unstable over the TLS connection because of the Jetty bug in SSL buffering introduced in Jetty 9.4.39. It caused large function jar uploads to fail frequently.
+  
+- **Resolution**: Upgraded Jetty to 9.4.42.v20210604, so that `pulsar-admin` connection to proxy is stable when TLS is enabled.
+
+# What is Next?
+
+If you are interested in learning more about Pulsar 2.7.3, you can [download 2.7.3](https://pulsar.apache.org/en/versions/) and try it out now! 
+
+Do you have a Pulsar story to share? Join us and speak at Pulsar Virtual Summit
+Europe 2021! Feel free to [submit an abstract today](https://streamnative.io/en/blog/community/2021-06-30-announcing-pulsar-virtual-summit-europe-2021-cfp-is-open)!

Review comment:
       the link "https://streamnative.io/en/blog/community/2021-06-30-announcing-pulsar-virtual-summit-europe-2021-cfp-is-open" does not work, probably there is some typo.
   
   can we add a link to the CFP on the official Pulsar Summit  website https://pulsar-summit.org/ ? 




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