Ishan Chattopadhyaya created SOLR-15840:
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Summary: Performance degradation with Http2 client
Key: SOLR-15840
URL: https://issues.apache.org/jira/browse/SOLR-15840
Project: Solr
Issue Type: Task
Security Level: Public (Default Security Level. Issues are Public)
Reporter: Ishan Chattopadhyaya
The HTTP/2 client for internode communication has some serious bottleneck when
the system is at a load. For the same scenario, the HTTP1 client performs much
better.
Here's how to reproduce the test:
{code}
git clone https://github.com/fullstorydev/solr-bench
mvn clean compile assembly:single
./cleanup.sh && ./stress.sh http2-bug.json
{code}
^ This will run a stress test scenario using the HTTP1 client. After running
this, change this line from http1=true to http1=false and re-run the test:
https://github.com/fullstorydev/solr-bench/blob/master/http2-bug.json#L92
I ran this test on my AMD Ryzen 5700G, 64GB RAM machine. It has 8 cores/16
threads. The test with http1=true passes in about 30-40 minutes. The test with
http1=false hangs indefinitely, with queries getting timed out all the time and
the system experiencing some hang/stuck. All queries are sent to the node at
port 50000, where we're changing the client type.
Test plan is here:
https://github.com/fullstorydev/solr-bench/blob/master/http2-bug.json
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