Hi,
Are the same requests sometimes stalling and sometimes fast, or is it
some particular queries that take hours?
There are some things you should avoid with SolrCloud, and deep paging
(i.e. a large number for the start or rows parameter) is a typical issue
(see e.g. https://yonik.com/solr/paging-and-deep-paging/ for more
information).
Best,
Ere
Satya Nand kirjoitti 8.12.2022 klo 13.27:
Hi,
Greetings for the day,
We are facing a strange problem in Solr cloud where a few requests are
taking hours to complete. Some requests return with a 0 status code and
some with a 500 status code. The recent request took more than 5 hours to
complete with only a 9k results count.
These queries create problems in closing old searchers, Some times there
are 3-4 searchers where one is a new searcher and the others are just stuck
because a few queries are tracking hours. Finally, the application slows
down horribly, and the load increases.
I have downloaded the stack trace of the affected node and tried to analyze
this stack trace online. but I couldn't get many insights from it.
.
Stack Trace:
https://fastthread.io/my-thread-report.jsp?p=c2hhcmVkLzIwMjIvMTIvOC9sb2dzLnR4dC0tMTAtNTUtMzA=&;
JVM Settings: We are using Parallel GC, can this be causing this much log
pause?
-XX:+UseParallelGC
-XX:-OmitStackTraceInFastThrow
-Xms12g
-Xmx12g
-Xss256k
What more we can check here to find the root cause and prevent this from
happening again?
Thanks in advance
--
Ere Maijala
Kansalliskirjasto / The National Library of Finland
