From: Kai Moritz <kai@juplo.de>
Date: Mon, 26 Feb 2024 18:55:19 +0000 (+0100)
Subject: fix: Errors during shard-publishing should not kill the instance
X-Git-Tag: rebase--2024-02-27--11-49~19
X-Git-Url: http://juplo.de/gitweb/?a=commitdiff_plain;h=13f86063f851fc2c4ad6de56c8edb78bff9d0592;hp=fd0c7edb6ca97b53a13d8e6d1bf5149d53d36a5f;p=demos%2Fkafka%2Fchat

fix: Errors during shard-publishing should not kill the instance

* `HaproxyShardingPublisherStrategy` has to transform any exception into
  a `Mono.error()`.
* `DataChannel.onPartitionsAssigned(..)` has to log and swallow errors
  during the propagation of the shard-ownership.
---

diff --git a/src/main/java/de/juplo/kafka/chat/backend/implementation/haproxy/HaproxyShardingPublisherStrategy.java b/src/main/java/de/juplo/kafka/chat/backend/implementation/haproxy/HaproxyShardingPublisherStrategy.java
index 3caaeb38..ad71d497 100644
--- a/src/main/java/de/juplo/kafka/chat/backend/implementation/haproxy/HaproxyShardingPublisherStrategy.java
+++ b/src/main/java/de/juplo/kafka/chat/backend/implementation/haproxy/HaproxyShardingPublisherStrategy.java
@@ -5,7 +5,6 @@ import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import reactor.core.publisher.Mono;
 
-import java.io.IOException;
 import java.net.SocketAddress;
 import java.nio.ByteBuffer;
 import java.nio.channels.SocketChannel;
@@ -33,7 +32,7 @@ public class HaproxyShardingPublisherStrategy implements ShardingPublisherStrate
       socketChannel.close();
       return Mono.just(instanceId);
     }
-    catch (IOException e)
+    catch (Exception e)
     {
       return Mono.error(e);
     }
diff --git a/src/main/java/de/juplo/kafka/chat/backend/implementation/kafka/DataChannel.java b/src/main/java/de/juplo/kafka/chat/backend/implementation/kafka/DataChannel.java
index fdb16fbd..b4cc33f5 100644
--- a/src/main/java/de/juplo/kafka/chat/backend/implementation/kafka/DataChannel.java
+++ b/src/main/java/de/juplo/kafka/chat/backend/implementation/kafka/DataChannel.java
@@ -155,7 +155,8 @@ public class DataChannel implements Runnable, ConsumerRebalanceListener
               "Could not publish instance {} as owner of shard {}: {}",
               instanceId,
               partition,
-              throwable))
+              throwable.toString()))
+          .onErrorComplete()
           .block();
     });