Background

Event binding in ReactJs components required because of this keyword works in JavaScript, within click handler function this keyword will lost its context (component instance) or value.

1. bind the handler in JSX render Read on →

Rails 6 require Ruby version 2.5 or greater. Upgrade to at least rails 5.2 or later versions and make sure application run properly without any failure, then attempt to upgrade to 6.0, follow upgrade guide.

ApplicationRecord – Multiple databases support

Active Record supports switching between multiple databases with a minimal change in codebase but a major impact on multiple replica set db. With multiple db support, rails application can have a read-only version of your database to use in areas known for having slow queries, or if it need to write to different databases depending on which controller request. This requires a change in database.yml setup, ie. Read on →

Docker Plugin enables jenkins to run jobs as docker container. In such case we dont need to setup jenkins nodes(agents) with specific binaries, instead docker images will be used to run jobs. Read on →

Error Trace

06-10 01:15:05 131 pool-9-thread-5 ERROR [] -
commit failed
org.apache.kafka.clients.consumer.CommitFailedException: Commit cannot be completed since the group has already rebalanced and assigned the partitions to another member. This means that the time between subsequent calls to poll() was longer than the configured max.poll.interval.ms, which typically implies that the poll loop is spending too much time message processing. You can address this either by increasing the session timeout or by reducing the maximum size of batches returned in poll() with max.poll.records.
at org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.sendOffsetCommitRequest(ConsumerCoordinator.java:713) ~[MsgAgent-jar-with-dependencies.jar:na]
at org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.commitOffsetsSync(ConsumerCoordinator.java:596) ~[MsgAgent-jar-with-dependencies.jar:na]
at org.apache.kafka.clients.consumer.KafkaConsumer.commitSync(KafkaConsumer.java:1218) ~[ConsumerService-jar-with-dependencies.jar:na]
at com.vatrai.consumer.service.ConsumerServiceImpl.consume(ConsumerServiceImpl.java:67) ~[ConsumerService-jar-with-dependencies.jar:na]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_161]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_161]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_161]

Reason

Consumer invoked the polling method to obtain the messages. Read on →

If it is required to run Jenkins master in an isolated network and master should not be allowed to connected to its nodes(agents), we can use JNLP method to add agents to master to process jobs in distributed manner. In this scenario, its not desirable to have master connections with slave(agent) nodes but agent to master connections only required. Read on →