When Kafka is running, I mean producer/consumer connected to server and published/subscribed messages normally, what happen when Kafka server is down? Today, to answer this, I try to stop Kafka server (on my local machine): Firstly, the Kafka consumer is still running normally (maybe forever until the server is up), that what I expected. Secondly, the Kafka producer was terminated by these exceptions: Caused by: org.apache.kafka.common.errors.TimeoutException: Topic <> not present in metadata after 60000 ms. The exception was thrown by this config parameter: kafka.max.block.ms is expired, the default is 60000s. Caused by: org.apache.kafka.common.errors.TimeoutException: Expiring 1 record(s) for <>:120010 ms has... [Read More]

In MySQL, if a single index is solely used to weed out rows to be reviewed, I didn’t see much of a difference between a single index and a composite index based on my prior experience. However, I had a personal experience with one last week. I want to share something with you today. [Read More]