roachtest: copy/bank/rows=10000000,nodes=9,txn=false failed

[cockroach-teamcity]

SHA: https://github.com/cockroachdb/cockroach/commits/e6348bb4abbfd117424c382ce5ab42e8abbe88f0

Parameters:

To repro, try:

# Don't forget to check out a clean suitable branch and experiment with the
# stress invocation until the desired results present themselves. For example,
# using stress instead of stressrace and passing the '-p' stressflag which
# controls concurrency.
./scripts/gceworker.sh start && ./scripts/gceworker.sh mosh
cd ~/go/src/github.com/cockroachdb/cockroach && \
make stressrace TESTS=copy/bank/rows=10000000,nodes=9,txn=false PKG=roachtest TESTTIMEOUT=5m STRESSFLAGS='-maxtime 20m -timeout 10m' 2>&1 | tee /tmp/stress.log

Failed test: https://teamcity.cockroachdb.com/viewLog.html?buildId=974325&tab=buildLog

The test failed on release-2.1:
	test.go:1002: test timed out (11h48m33.540667875s)
	test.go:611,copy.go:120,cluster.go:1432,errgroup.go:58: failed to copy rows: pq: server is not accepting clients
	test.go:606,cluster.go:1453,copy.go:133,copy.go:146: Goexit() was called

[andreimatei]

Hopefully fixed by #31570