> On Jun 2, 2020, at 12:56 AM, Victoria Zuberman > <victoria.zuber...@imperva.com> wrote: > > Hi, > > Background: > Kafka cluster > 7 brokers, with 4T disk each > version 2.3 (recently upgraded from 0.1.0 via 1.0.1) > > Problem: > Used disk space went from 40% to 80%. > Looking for root cause. > > Suspects: > > 1. Incoming traffic > > Ruled out, according to metrics no significant change in “bytes in” for > topics in cluster > > 1. Upgrade > > The raise started on the day of upgrade to 2.3 > > But we upgraded another cluster in the same way and we don’t see similar > issue there > > Is there a known change or issue at 2.3 related to disk space usage? > > 1. Replication factor > > Is there a way to see whether replication factor of any topic was changed > recently? Didn’t find in metrics...
You can use the kafka-topics.sh script to check the replica count for all your topics. Upgrading would not have affected the replica count, though. > 1. Retention > > Is there a way to see whether retention was changed recently? Didn’t find in > metrics... You can use kafka-topics.sh —-zookeeper host:2181 --describe --topics-with-overrides to list any topics with non-default retention, but I’m guessing that’s not it. If your disk usage went from 40 to 80% on all brokers — effectively doubled — it could be that your kafka data log directory path(s) changed during the upgrade. As you upgraded each broker and (re)started the kafka, it would have left the existing data under the old one path and created new topic partition directories and logs under the new path as it rejoined the cluster. Have you verified that your data log directory locations are the same as they used to be? > Would appreciate any other ideas or investigation leads > > Thanks, > Victoria > > ------------------------------------------- > NOTICE: > This email and all attachments are confidential, may be proprietary, and may > be privileged or otherwise protected from disclosure. They are intended > solely for the individual or entity to whom the email is addressed. However, > mistakes sometimes happen in addressing emails. If you believe that you are > not an intended recipient, please stop reading immediately. Do not copy, > forward, or rely on the contents in any way. Notify the sender and/or > Imperva, Inc. by telephone at +1 (650) 832-6006 and then delete or destroy > any copy of this email and its attachments. The sender reserves and asserts > all rights to confidentiality, as well as any privileges that may apply. Any > disclosure, copying, distribution or action taken or omitted to be taken by > an unintended recipient in reliance on this message is prohibited and may be > unlawful. > Please consider the environment before printing this email.
