You have to ser this variable in your start up parAmeters java.io.tmpdir Example
export KAFKA_OPTS="-Djava.io.tmpdir=/your/custom/tmpdir" On Tue, 18 Feb 2025 at 1:26 PM, Bruno Cadonna <cado...@apache.org> wrote: > Hi Benson, > > you got a reply from Josep on Feb 17th. > > Copying Josep's e-mail here for simplicity: > > Hi Xiong, > > The release notes are also in Github (both github.com/apache/kafka/ and > github.com/apache/kafka-site) and we can fix them with a PR. Regarding > your > findings, what you say makes sense, and indeed the `/tmp` folder might need > exec permissions. > > Would you be up for a PR? > > Best, > > > > Best, > Bruno > > On 18.02.25 02:23, Xiong Benson wrote: > > + users@kafka.apache.org<mailto:users@kafka.apache.org> > > > > Dear Kafka community admins, > > > > Could you please reply to my below question? The issue I mentioned > below exposed a notable issue in kafka 3.8.1 client which has not been > explicitly stated in any of the release note document. > > > > Thanks, > > Benson > > ________________________________ > > 发件人: Xiong Benson <bo.xi...@outlook.com> > > 发送时间: 2025年2月17日 22:50 > > 收件人: d...@kafka.apache.org <d...@kafka.apache.org> > > 主题: Kafka 3.8.1 /tmp exec permission issue also has impact on Kafka > client > > > > Dear Kafka devs, > > > > The Kafka's 3.8.1 release note mentioned [KAFKA-17227< > https://issues.apache.org/jira/browse/KAFKA-17227>] - Apache Kafka 3.8.0 > /tmp exec permission where it brings me to > https://kafka.apache.org/documentation/#upgrade_381_notable whose content > is specifically for the kafka cluster(server). But this is not precise > enough for the issue. > > > > Below are my summarized missing points that are not covered by > https://kafka.apache.org/documentation/#upgrade_381_notable based on our > tests. > > [http://apache-kafka.org/images/apache-kafka.png]< > https://kafka.apache.org/documentation/#upgrade_381_notable> > > Apache Kafka<https://kafka.apache.org/documentation/#upgrade_381_notable > > > > Apache Kafka: A Distributed Streaming Platform. > > kafka.apache.org > > When "enable.metrics.push" is set to true for the kafka client and there > is also the client metric subscription configured. > > > > 1. > > If there is no additional setting configured for the kafka client, then > /tmp(controlled by System property:"java.io.tmpdir") folder must have exec > permission, otherwise ZstdOutputStreamNoFinalizer will fail the > initialization and may break the relevent thread resulting in kafka client > not functioning correct.(I've tested this with /tmp without exec permission) > > 2. > > Client needs to set System property:"ZstdTempFolder" to specify a folder > with exec permission, otherwise ZstdOutputStreamNoFinalizer will also fail > to initialize and may break client function(I haven't tested this but based > on reading code for com.github.luben.zstd.util.Native). > > > > Above 1. is the most common scenario that Kaka client users will work > with. This is not a corner case and /tmp is also a commonly used > directory, making it a notable change for Kafka client using client metric > collection feature. > > > > > > I wonder if my above finding is correct? If it is the case, why this > information is not accurately stated in the release note nor notable change > note consider its notable impact? Is it possible to add it somewhere or > patch the release note and notable change note? > > > > Looking forward to your help for the answer! > > > > > > Thanks, > > Benson > > > >
