paul-rogers edited a comment on issue #1813: DRILL-7306: Disable schema-only batch for new scan framework URL: https://github.com/apache/drill/pull/1813#issuecomment-506999568 When running the full tests, the following failed in `java-exec`: ``` [ERROR] Errors: [ERROR] TestDynamicUDFSupport.testReRegisterTheSameJarWithDifferentContent:600->BaseTestQuery.testRunAndReturn:340 » Rpc ``` When running this unit test in Eclipse, two tests failed: `testDropFunction` and `testSuccessfulRegistrationAfterSeveralRetryAttempts`. Then, `testConcurrentRemoteRegistryUpdateWithDuplicates` hung forever. I believe these tests (and one other) seem to fail about 50% of the time on my builds. For example: ``` [ERROR] Errors: [ERROR] TestPStoreProviders.verifyZkStore:67 » NoSuchElement ``` The workaround seems to be to rebuild all of Drill. That is, the rough pattern seems to be that this test will run once after a clean build, but will fail if run a second time or after a code change. Not sure if this is the exact pattern; something like this happens. The result is that it is hard to tell if my code broke something or if the tests are just flaky. I wonder, is there something we can do to stabilize these tests? All other tests run fine if I rerun them a second time on the same build or after I make a small code change. Anyway, after doing a full rebuild and retest, this commit does pass all unit tests.
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