Ye Ji created KAFKA-7620: ---------------------------- Summary: ConfigProvider is broken for connect when TTL is not null Key: KAFKA-7620 URL: https://issues.apache.org/jira/browse/KAFKA-7620 Project: Kafka Issue Type: Bug Components: KafkaConnect Affects Versions: 2.0.1 Reporter: Ye Ji
If the ConfigData returned by ConfigProvider.get implementations has non-null and non-negative ttl, it will trigger infinite recursion, here is an excerpt of the stack trace: {code:java} at org.apache.kafka.connect.runtime.WorkerConfigTransformer.scheduleReload(WorkerConfigTransformer.java:62) at org.apache.kafka.connect.runtime.WorkerConfigTransformer.scheduleReload(WorkerConfigTransformer.java:56) at org.apache.kafka.connect.runtime.WorkerConfigTransformer.transform(WorkerConfigTransformer.java:49) at org.apache.kafka.connect.runtime.distributed.ClusterConfigState.connectorConfig(ClusterConfigState.java:121) at org.apache.kafka.connect.runtime.distributed.DistributedHerder.connectorConfigReloadAction(DistributedHerder.java:648) at org.apache.kafka.connect.runtime.WorkerConfigTransformer.scheduleReload(WorkerConfigTransformer.java:62) at org.apache.kafka.connect.runtime.WorkerConfigTransformer.scheduleReload(WorkerConfigTransformer.java:56) at org.apache.kafka.connect.runtime.WorkerConfigTransformer.transform(WorkerConfigTransformer.java:49) {code} Basically, 1) if a non-null ttl is returned from the config provider, connect runtime will try to schedule a reload in the future, 2) scheduleReload function reads the config again to see if it is a restart or not, by calling org.apache.kafka.connect.runtime.WorkerConfigTransformer.transform to transform the config 3) the transform function calls config provider, and gets a non-null ttl, causing scheduleReload being called, we are back to step 1. To reproduce, simply fork the provided FileConfigProvider, and add a non-negative ttl to the ConfigData returned by the get functions. -- This message was sent by Atlassian JIRA (v7.6.3#76005)