Hi Jaydeep, thanks for reaching out.The most notable deadlock identified and resolved in the last few
years is https://issues.apache.org/jira/browse/CASSANDRA-15367: Memtable memory allocations may deadlock
(fixed in Apache Cassandra 3.0.21).Mentioning for completeness - since the release of Cassandra 3.0.14
several years ago, many critical bugs whose consequences include data loss have been resolved. I'd
strongly recommend upgrading to 3.0.26 - and ideally to 4.0 after you've confirmed behavior is as
expected on 3.0.26.– ScottOn Mar 22, 2022, at 9:30 PM, Jaydeep Chovatia
<chovatia.jayd...@gmail.com> wrote:Hi,I have been using Cassandra 3.0.14 in production for a long
time. Recently I have found a bug in that, all of a sudden the transport thread-pool hangs. Observation:
If I do nodetool tpstats, then it shows "Native-Transport-Requests" is blocking
"Active" tasks. I stopped the complete traffic, and sent a very light load, but still my
requests are getting denied, and active transport blocked tasks keep happening.Fix:If I restart my
cluster, then everything works fine, which means there might be some deadlock, etc. in the system.Is
anyone aware of this issue? I know there have been quite a lot of fixes on top of 3.0.14, is there any
specific fix that addresses this particular issue?Any help would be appreciated. Yours Sincerely,Jaydeep
