Github user mans2singh commented on the issue:
https://github.com/apache/nifi/pull/2045
Hey Folks:
The travis-ci build is failing (? timing out) with the error included
below. Can someone let me know how to resolve this ?
Thanks
```Output file
/home/travis/build/apache/nifi/nifi-commons/nifi-expression-language/target/generated-sources/antlr3/org/apache/nifi/attribute/expression/language/antlr/AttributeExpressionLexer.java
does not exist: must build
/home/travis/build/apache/nifi/nifi-commons/nifi-expression-language/src/main/antlr3/org/apache/nifi/attribute/expression/language/antlr/AttributeExpressionLexer.g
org/apache/nifi/attribute/expression/language/antlr/AttributeExpressionLexer.g
Output file
/home/travis/build/apache/nifi/nifi-commons/nifi-expression-language/target/generated-sources/antlr3/org/apache/nifi/attribute/expression/language/antlr/AttributeExpressionParser.java
does not exist: must build
/home/travis/build/apache/nifi/nifi-commons/nifi-expression-language/src/main/antlr3/org/apache/nifi/attribute/expression/language/antlr/AttributeExpressionParser.g
org/apache/nifi/attribute/expression/language/antlr/AttributeExpressionParser.g
No output has been received in the last 10m0s, this potentially indicates a
stalled build or something wrong with the build itself.
Check the details on how to adjust your build configuration on:
https://docs.travis-ci.com/user/common-build-problems/#Build-times-out-because-no-output-was-received
The build has been terminated
```
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