[Java] Failures on master

[asfimport]

I'm getting builds failing today with errors like

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.6.2:compile (default-compile) on project arrow-vector: Compilation failure: Compilation failure:
[ERROR] /home/travis/build/apache/arrow/java/vector/src/main/java/org/apache/arrow/vector/complex/ListVector.java:[356,4] error: cannot find symbol
[ERROR] symbol:   variable Preconditions
[ERROR] location: class ListVector
[ERROR] /home/travis/build/apache/arrow/java/vector/src/main/java/org/apache/arrow/vector/complex/NonNullableStructVector.java:[96,4] error: cannot find symbol
[ERROR] symbol:   variable Preconditions
[ERROR] location: class NonNullableStructVector
[ERROR] -> [Help 1]

see https://travis-ci.org/apache/arrow/jobs/571958044

Is this introduced by a recent patch?

Reporter: Wes McKinney / @wesm
Assignee: Ji Liu / @tianchen92

PRs and other links:

• GitHub Pull Request #5090

_{Note: This issue was originally created as ARROW-6241. Please see the migration documentation for further details.}

[asfimport]

David Li / @lidavidm:
These two commits merged cleanly but break each other:

6eae790 introduced use of Preconditions

c45def6 removed the import (as the change there made it unused)

 

[asfimport]

Wes McKinney / @wesm:
Ah great, thanks @lidavidm. Such issues are bound to happen now and then.

[asfimport]

Ji Liu / @tianchen92:
Right, it was introduced by our two recent patches, I have just submitted a PR.

[asfimport]

Micah Kornfield / @emkornfield:
Issue resolved by pull request 5090
#5090