I checked the JIRA and looks like FLINK-2111 should address the issue which I am facing. I am canceling the job from dashboard.
I am using kafka source and HDFS rolling sink. https://issues.apache.org/jira/browse/FLINK-2111 Is this JIRA part of Flink 1.0.0? Thanks, Naveen From: "Madhire, Venkat Naveen Kumar Reddy" <naveen.madh...@capitalone.com<mailto:naveen.madh...@capitalone.com>> Reply-To: "user@flink.apache.org<mailto:user@flink.apache.org>" <user@flink.apache.org<mailto:user@flink.apache.org>> Date: Friday, May 13, 2016 at 10:58 AM To: "user@flink.apache.org<mailto:user@flink.apache.org>" <user@flink.apache.org<mailto:user@flink.apache.org>> Subject: Flink recovery Hi, We are trying to test the recovery mechanism of Flink with Kafka and HDFS sink during failures. I’ve killed the job after processing some messages and restarted the same job again. Some of the messages I am seeing are processed more than once and not following the exactly once semantics. Also, using the checkpointing mechanism and saving the state checkpoints into HDFS. Below is the checkpoint code, envStream.enableCheckpointing(11); envStream.getCheckpointConfig().setCheckpointingMode(CheckpointingMode.EXACTLY_ONCE); envStream.getCheckpointConfig().setCheckpointTimeout(60000); envStream.getCheckpointConfig().setMaxConcurrentCheckpoints(4); envStream.setStateBackend(new FsStateBackend("hdfs://ipaddr/mount/cp/checkpoint/")); One thing I’ve noticed is lowering the time to checkpointing is actually lowering the number of messages processed more than once and 11ms is the lowest I can use. Is there anything else I should try to have exactly once message processing functionality. I am using Flink 1.0.0 and kafka 0.8 Thank you. ________________________________ The information contained in this e-mail is confidential and/or proprietary to Capital One and/or its affiliates and may only be used solely in performance of work or services for Capital One. The information transmitted herewith is intended only for use by the individual or entity to which it is addressed. If the reader of this message is not the intended recipient, you are hereby notified that any review, retransmission, dissemination, distribution, copying or other use of, or taking of any action in reliance upon this information is strictly prohibited. If you have received this communication in error, please contact the sender and delete the material from your computer. ________________________________________________________ The information contained in this e-mail is confidential and/or proprietary to Capital One and/or its affiliates and may only be used solely in performance of work or services for Capital One. The information transmitted herewith is intended only for use by the individual or entity to which it is addressed. If the reader of this message is not the intended recipient, you are hereby notified that any review, retransmission, dissemination, distribution, copying or other use of, or taking of any action in reliance upon this information is strictly prohibited. If you have received this communication in error, please contact the sender and delete the material from your computer.
