Hi,
we observed something similar a couple of weeks ago. When requests were
being originated not from the same private subnet as Solr’s but from a
Kubernetes pod, latency would spike to ~500 msec instead of the usual
2-3 msec. In our case the culprit turned out to be the Java security
manager sandbox, which is enabled by default:
~~~
# Runs solr in java security manager sandbox. This can protect against
some attacks.
# Runtime properties are passed to the security policy file
(server/etc/security.policy)
# You can also tweak via standard JDK files such as ~/.java.policy, see
https://s.apache.org/java8policy
# This is experimental! It may not work at all with Hadoop/HDFS
features.
# SOLR_SECURITY_MANAGER_ENABLED=true
~~~
When we set it to false, the extra latency disappeared.
Hope this helps.
Kind regards,
Corrado
On 31 Oct 2024, at 16:49, Litzba, Bernd wrote:
Hi all,
I have a question regarding Solr 9.x:
After we updated to Solr 9.x, we noticed that the first get/post
request on a new TCP session takes much longer compared to older
versions of Solr (we tested Solr 6.x and 8.x) - but only if this first
request is sent via a proxy. Without a proxy Solr9.x is as fast as the
previous versions.
