Github user vvysotskyi commented on the issue:
https://github.com/apache/drill/pull/908
Maven uses 'nearest-win' strategy to resolve conflicts and since we specify
the Jackson library in the pom file, there is no need to exclude it from other
libraries.
Therefore the result of the command `mvn dependency:tree | grep
com.fasterxml.jackson` is
```
[INFO] +- com.fasterxml.jackson.core:jackson-annotations:jar:2.7.8:compile
[INFO] +- com.fasterxml.jackson.core:jackson-databind:jar:2.7.8:compile
[INFO] | \- com.fasterxml.jackson.core:jackson-core:jar:2.7.8:compile
[INFO] +- com.fasterxml.jackson.core:jackson-annotations:jar:2.7.8:compile
[INFO] +- com.fasterxml.jackson.core:jackson-databind:jar:2.7.8:compile
[INFO] | \- com.fasterxml.jackson.core:jackson-core:jar:2.7.8:compile
[INFO] | +-
com.fasterxml.jackson.core:jackson-annotations:jar:2.7.8:compile
[INFO] | +- com.fasterxml.jackson.core:jackson-databind:jar:2.7.8:compile
[INFO] | | \- com.fasterxml.jackson.core:jackson-core:jar:2.7.8:compile
[INFO] | +-
com.fasterxml.jackson.core:jackson-annotations:jar:2.7.8:compile
[INFO] | +- com.fasterxml.jackson.core:jackson-databind:jar:2.7.8:compile
[INFO] | | \- com.fasterxml.jackson.core:jackson-core:jar:2.7.8:compile
[INFO] +- com.fasterxml.jackson.core:jackson-annotations:jar:2.7.8:compile
[INFO] +- com.fasterxml.jackson.core:jackson-databind:jar:2.7.8:compile
[INFO] | \- com.fasterxml.jackson.core:jackson-core:jar:2.7.8:compile
[INFO] +-
com.fasterxml.jackson.jaxrs:jackson-jaxrs-json-provider:jar:2.7.8:compile
[INFO] | +-
com.fasterxml.jackson.jaxrs:jackson-jaxrs-base:jar:2.7.8:compile
[INFO] | +- com.fasterxml.jackson.core:jackson-core:jar:2.7.8:compile
[INFO] | +- com.fasterxml.jackson.core:jackson-databind:jar:2.7.8:compile
[INFO] | \-
com.fasterxml.jackson.module:jackson-module-jaxb-annotations:jar:2.7.8:compile
[INFO] +-
com.fasterxml.jackson.module:jackson-module-afterburner:jar:2.7.8:compile
[INFO] | +-
com.fasterxml.jackson.core:jackson-annotations:jar:2.7.8:compile
[INFO] | +-
com.fasterxml.jackson.jaxrs:jackson-jaxrs-json-provider:jar:2.7.8:compile
[INFO] | | +-
com.fasterxml.jackson.jaxrs:jackson-jaxrs-base:jar:2.7.8:compile
[INFO] | | \-
com.fasterxml.jackson.module:jackson-module-jaxb-annotations:jar:2.7.8:compile
[INFO] | +-
com.fasterxml.jackson.module:jackson-module-afterburner:jar:2.7.8:compile
[INFO] +- com.fasterxml.jackson.core:jackson-core:jar:2.7.8:compile
[INFO] +- com.fasterxml.jackson.core:jackson-annotations:jar:2.7.8:compile
[INFO] +- com.fasterxml.jackson.core:jackson-databind:jar:2.7.8:compile
[INFO] | +-
com.fasterxml.jackson.core:jackson-annotations:jar:2.7.8:compile
[INFO] | +- com.fasterxml.jackson.core:jackson-databind:jar:2.7.8:compile
[INFO] | +-
com.fasterxml.jackson.jaxrs:jackson-jaxrs-json-provider:jar:2.7.8:compile
[INFO] | | +-
com.fasterxml.jackson.jaxrs:jackson-jaxrs-base:jar:2.7.8:compile
[INFO] | | \-
com.fasterxml.jackson.module:jackson-module-jaxb-annotations:jar:2.7.8:compile
[INFO] | +-
com.fasterxml.jackson.module:jackson-module-afterburner:jar:2.7.8:compile
[INFO] | +- com.fasterxml.jackson.core:jackson-core:jar:2.7.8:compile
[INFO] | +-
com.fasterxml.jackson.jaxrs:jackson-jaxrs-json-provider:jar:2.7.8:compile
[INFO] | | +-
com.fasterxml.jackson.jaxrs:jackson-jaxrs-base:jar:2.7.8:compile
[INFO] | | +- com.fasterxml.jackson.core:jackson-core:jar:2.7.8:compile
[INFO] | | \-
com.fasterxml.jackson.module:jackson-module-jaxb-annotations:jar:2.7.8:compile
[INFO] | +-
com.fasterxml.jackson.module:jackson-module-afterburner:jar:2.7.8:compile
[INFO] | +-
com.fasterxml.jackson.core:jackson-annotations:jar:2.7.8:compile
[INFO] | +- com.fasterxml.jackson.core:jackson-databind:jar:2.7.8:compile
[INFO] | +-
com.fasterxml.jackson.jaxrs:jackson-jaxrs-json-provider:jar:2.7.8:compile
[INFO] | | +-
com.fasterxml.jackson.jaxrs:jackson-jaxrs-base:jar:2.7.8:compile
[INFO] | | +- com.fasterxml.jackson.core:jackson-core:jar:2.7.8:compile
[INFO] | | \-
com.fasterxml.jackson.module:jackson-module-jaxb-annotations:jar:2.7.8:compile
[INFO] | +-
com.fasterxml.jackson.module:jackson-module-afterburner:jar:2.7.8:compile
[INFO] | +-
com.fasterxml.jackson.core:jackson-annotations:jar:2.7.8:compile
[INFO] | +- com.fasterxml.jackson.core:jackson-databind:jar:2.7.8:compile
[INFO] | +-
com.fasterxml.jackson.jaxrs:jackson-jaxrs-json-provider:jar:2.7.8:compile
[INFO] | | +-
com.fasterxml.jackson.jaxrs:jackson-jaxrs-base:jar:2.7.8:compile
[INFO] | | +- com.fasterxml.jackson.core:jackson-core:jar:2.7.8:compile
[INFO] | | \-
com.fasterxml.jackson.module:jackson-module-jaxb-annotations:jar:2.7.8:compile
[INFO] | +-
com.fasterxml.jackson.module:jackson-module-afterburner:jar:2.7.8:compile
[INFO] | +-
com.fasterxml.jackson.core:jackson-annotations:jar:2.7.8:compile
[INFO] | +- com.fasterxml.jackson.core:jackson-databind:jar:2.7.8:compile
[INFO] | +-
com.fasterxml.jackson.jaxrs:jackson-jaxrs-json-provider:jar:2.7.8:compile
[INFO] | | +-
com.fasterxml.jackson.jaxrs:jackson-jaxrs-base:jar:2.7.8:compile
[INFO] | | +- com.fasterxml.jackson.core:jackson-core:jar:2.7.8:compile
[INFO] | | \-
com.fasterxml.jackson.module:jackson-module-jaxb-annotations:jar:2.7.8:compile
[INFO] | +-
com.fasterxml.jackson.module:jackson-module-afterburner:jar:2.7.8:compile
[INFO] | +-
com.fasterxml.jackson.core:jackson-annotations:jar:2.7.8:compile
[INFO] | +- com.fasterxml.jackson.core:jackson-databind:jar:2.7.8:compile
[INFO] | +-
com.fasterxml.jackson.core:jackson-annotations:jar:2.7.8:compile
[INFO] | +- com.fasterxml.jackson.core:jackson-databind:jar:2.7.8:compile
[INFO] | | \- com.fasterxml.jackson.core:jackson-core:jar:2.7.8:compile
[INFO] | +-
com.fasterxml.jackson.jaxrs:jackson-jaxrs-json-provider:jar:2.7.8:compile
[INFO] | | +-
com.fasterxml.jackson.jaxrs:jackson-jaxrs-base:jar:2.7.8:compile
[INFO] | | \-
com.fasterxml.jackson.module:jackson-module-jaxb-annotations:jar:2.7.8:compile
[INFO] | +-
com.fasterxml.jackson.module:jackson-module-afterburner:jar:2.7.8:compile
[INFO] | +-
com.fasterxml.jackson.jaxrs:jackson-jaxrs-json-provider:jar:2.7.8:compile
[INFO] | | +-
com.fasterxml.jackson.jaxrs:jackson-jaxrs-base:jar:2.7.8:compile
[INFO] | | +- com.fasterxml.jackson.core:jackson-core:jar:2.7.8:compile
[INFO] | | \-
com.fasterxml.jackson.module:jackson-module-jaxb-annotations:jar:2.7.8:compile
[INFO] | +-
com.fasterxml.jackson.module:jackson-module-afterburner:jar:2.7.8:compile
[INFO] | +-
com.fasterxml.jackson.core:jackson-annotations:jar:2.7.8:compile
[INFO] | +- com.fasterxml.jackson.core:jackson-databind:jar:2.7.8:compile
[INFO] | +-
com.fasterxml.jackson.core:jackson-annotations:jar:2.7.8:compile
[INFO] | +- com.fasterxml.jackson.core:jackson-databind:jar:2.7.8:compile
[INFO] | +-
com.fasterxml.jackson.jaxrs:jackson-jaxrs-json-provider:jar:2.7.8:compile
[INFO] | | +-
com.fasterxml.jackson.jaxrs:jackson-jaxrs-base:jar:2.7.8:compile
[INFO] | | \-
com.fasterxml.jackson.module:jackson-module-jaxb-annotations:jar:2.7.8:compile
[INFO] | +-
com.fasterxml.jackson.module:jackson-module-afterburner:jar:2.7.8:compile
[INFO] | +- com.fasterxml.jackson.core:jackson-core:jar:2.7.8:compile
[INFO] | | \- com.fasterxml.jackson.core:jackson-core:jar:2.7.1:compile
[INFO] | +- com.fasterxml.jackson.core:jackson-databind:jar:2.7.2:compile
[INFO] | \-
com.fasterxml.jackson.core:jackson-annotations:jar:2.7.2:compile
[INFO] | +-
com.fasterxml.jackson.jaxrs:jackson-jaxrs-json-provider:jar:2.7.8:compile
[INFO] | | +-
com.fasterxml.jackson.jaxrs:jackson-jaxrs-base:jar:2.7.8:compile
[INFO] | | \-
com.fasterxml.jackson.module:jackson-module-jaxb-annotations:jar:2.7.8:compile
[INFO] | +-
com.fasterxml.jackson.module:jackson-module-afterburner:jar:2.7.8:compile
[INFO] | | +-
com.fasterxml.jackson.jaxrs:jackson-jaxrs-json-provider:jar:2.7.8:compile
[INFO] | | | +-
com.fasterxml.jackson.jaxrs:jackson-jaxrs-base:jar:2.7.8:compile
[INFO] | | | \-
com.fasterxml.jackson.module:jackson-module-jaxb-annotations:jar:2.7.8:compile
[INFO] | | +-
com.fasterxml.jackson.module:jackson-module-afterburner:jar:2.7.8:compile
[INFO] | +- com.fasterxml.jackson.core:jackson-core:jar:2.7.8:compile
[INFO] | +-
com.fasterxml.jackson.core:jackson-annotations:jar:2.7.8:compile
[INFO] | +- com.fasterxml.jackson.core:jackson-databind:jar:2.7.8:compile
```
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