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Bug#927343: ganeti: flaky autopkgtest: Unhandled protocol error while talking to the master daemon

Source: ganeti
Version: 2.15.2-7+deb9u3
Severity: important
X-Debbugs-CC: debian-ci@lists.debian.org
User: debian-ci@lists.debian.org
Usertags: flaky
Control: found -1 2.16.0-5

Dear maintainers,

Your package has an autopkgtest, great. However, it fails
once in a while in unstable, testing and stable. Because the
unstable-to-testing migration software now blocks on regressions in
testing, flaky tests, i.e. tests that flip between passing and failing
without changes to the list of installed packages, are wasting peoples
time. Please either fix the test to be more robust, or mark the
particular test as "flaky".

I copied some of the output at the bottom of this report. The failure
isn't always the same however.

More information about this bug and the reason for filing it can be found on



Command: ssh localhost /tmp/ganeti-vcluster/node1/cmd ''\''gnt-cluster
modify --ipolicy-vcpu-ratio=4.0'\'''
Stderr was:
---- FAILED [TestClusterModifyIPolicy] gnt-cluster modify --ipolicy-*:
Command 'gnt-cluster modify --ipolicy-vcpu-ratio=4.0' on node node1
failed, exit code 1
>>>> 2019-04-17 09:45:25.533704 time=0:00:04.369720
[TestClusterModifyIPolicy] gnt-cluster modify --ipolicy-*
---- BLOCK FAILED [RunClusterTests] Runs tests related to gnt-cluster:
Command 'gnt-cluster modify --ipolicy-vcpu-ratio=4.0' on node node1
failed, exit code 1
^^^^ BLOCK 2019-04-17 09:45:25.533784 time=0:02:26.279818
[RunClusterTests] Runs tests related to gnt-cluster
Unhandled protocol error while talking to the master daemon:
Error while deserializing response: Extra data: line 1 column 29 - line
1 column 70 (char 28 - 69)
Traceback (most recent call last):
  File "./qa/ganeti-qa.py", line 1135, in <module>
  File "/usr/share/ganeti/default/ganeti/rapi/client.py", line 278, in
    return fn(*args, **kwargs)
  File "./qa/ganeti-qa.py", line 1130, in main
  File "./qa/ganeti-qa.py", line 957, in RunQa
  File "./qa/ganeti-qa.py", line 169, in RunTestBlock
    return fn(*args, **kwargs)
  File "./qa/ganeti-qa.py", line 275, in RunClusterTests
    RunTestIf(test, fn)
  File "./qa/ganeti-qa.py", line 150, in RunTestIf
    RunTest(fn, *args, **kwargs)
  File "./qa/ganeti-qa.py", line 112, in RunTest
    retval = fn(*args, **kwargs)
line 918, in TestClusterModifyIPolicy
    AssertCommand(cmd, fail=not good)
line 223, in AssertCommand
    _AssertRetCode(rcode, fail, cmdstr, nodename)
line 156, in _AssertRetCode
    (cmdstr, nodename, rcode))
qa_error.Error: Command 'gnt-cluster modify --ipolicy-vcpu-ratio=4.0' on
node node1 failed, exit code 1

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