release-26.2.7-rc: roachtest: ssh_problem failed

**Note:** This build has runtime assertions enabled. If the same failure was hit in a run without assertions enabled, there should be a similar failure without this message. If there isn't one, then this failure is likely due to an assertion violation or (assertion) timeout.

roachtest.ssh_problem [failed](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_Roachtests_RoachtestNightlyGcePrivateBazel/21499540?buildTab=log) with [artifacts](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_Roachtests_RoachtestNightlyGcePrivateBazel/21499540?buildTab=artifacts#/drain-and-decommission/nodes=9) on release-26.2.7-rc @ [b1582e0a72ed7f3813a4346a2ddce2d9a29c30c2](https://github.com/cockroachdb/cockroach/commits/b1582e0a72ed7f3813a4346a2ddce2d9a29c30c2):

```
test drain-and-decommission/nodes=9 failed: (test_runner.go:1027).func4: cluster.PutE: _potential_ SSH flake (``ssh -vvv`` log retained in /artifacts/drain-and-decommission/nodes=9/run_1/ssh/ssh_193442.673340428_n1_if-hostname-teamcity.log): TRANSIENT_ERROR(ssh_problem): exit status 255 [owner=test-eng]
```

Parameters:
- arch=amd64
- cloud=gce
- coverageBuild=false
- cpu=4
- diskCount=0
- encrypted=false
- runtimeAssertionsBuild=true
Help

See: [roachtest README](https://github.com/cockroachdb/cockroach/blob/master/pkg/cmd/roachtest/README.md)

See: [How To Investigate \(internal\)](https://cockroachlabs.atlassian.net/l/c/SSSBr8c7)

See: [Grafana](https://go.crdb.dev/roachtest-grafana/teamcity-21499540/drain-and-decommission-nodes-9/-62135596800000/-62135596680000)

Same failure on other branches

- #174690 roachtest: ssh_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-25.4.17-rc]
- #173564 roachtest: ssh_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-25.4.15-rc]
- #173555 roachtest: ssh_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-25.2.23-rc]
- #173325 release-26.2.6-rc: roachtest: ssh_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-26.2.6-rc]
- #173324 release-26.2.6-rc: roachtest: ssh_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-26.2.6-rc]
- #173320 basalt-26.3: roachtest: ssh_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-basalt-26.3]
- #173321 basalt-26.3: roachtest: ssh_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-basalt-26.3]
- #173249 release-26.3.1-rc: roachtest: ssh_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-26.3.1-rc]
- #172584 release-26.3.0-rc: roachtest: ssh_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-26.3.0-rc]
- #172557 roachtest: ssh_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-25.4.14-rc]

/cc @cockroachlabs/test-eng

[This test on roachdash](https://roachdash.crdb.dev/?filter=status:open%20t:.*ssh_problem.*&sort=title+created&display=lastcommented+project) | [Improve this report!](https://github.com/cockroachdb/cockroach/tree/master/pkg/cmd/bazci/githubpost/issues)

Jira issue: CRDB-67921

Start with pkg/cmd/roachtest/README.md and test_runner.go:1027, then inspect the retained SSH log at the reported artifact path for the drain-and-decommission/nodes=9 run. Compare the linked failures on other branches and determine whether this is an assertion-related or recurring SSH problem. Done means the cause is identified and the failure has a documented resolution or fix.

Written by the indexing model from the issue text.