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# dev

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09/06/2022, 5:27 PM

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Gian Merlino

09/07/2022, 7:52 AM

that's from autogenerated code; if your IDE isn't doing the generation on its own, you can do it with maven by running

mvn compile

Gian Merlino

09/07/2022, 7:52 AM

you should just have to do that once and then you can use IDE like normal

Didip Kerabat

09/07/2022, 10:49 PM

ooo gotcha, thank you for your explanation.

Didip Kerabat

09/09/2022, 1:36 AM

I got this error when running

mvn compile

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[ERROR] /path/to/druid/sql/src/main/java/org/apache/druid/sql/calcite/parser/DruidSqlParserImplFactory.java:[33,16] cannot access org.apache.druid.sql.calcite.parser.DruidSqlParserImpl
  bad class file: /path/to/druid/sql/target/classes/org/apache/druid/sql/calcite/parser/DruidSqlParserImpl.class
    unable to access file: java.nio.file.NoSuchFileException: /path/to/druid/sql/target/classes/org/apache/druid/sql/calcite/parser/DruidSqlParserImpl.class
    Please remove or make sure it appears in the correct subdirectory of the classpath.

But that

.class

file exists.

Gian Merlino

09/09/2022, 2:09 AM

i find sometimes maven gets confused and a clean helps

Gian Merlino

09/09/2022, 2:09 AM

i.e.

mvn clean

then

mvn compile

Didip Kerabat

09/13/2022, 6:13 AM

When I did

mvn clean && mvn compile

, I got this error:

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[ERROR] Failed to execute goal on project druid-processing: Could not resolve dependencies for project org.apache.druid:druid-processing:jar:25.0.0-SNAPSHOT: Failure to find org.apache.druid:druid-core:jar:tests:25.0.0-SNAPSHOT in <https://repository.apache.org/snapshots> was cached in the local repository, resolution will not be reattempted until the update interval of apache.snapshots has elapsed or updates are forced -> [Help 1]

But if I run that several more times, the compilation actually failed in a different place.

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[ERROR] Failed to execute goal org.apache.maven.plugins:maven-clean-plugin:2.5:clean (default-clean) on project druid-server: Failed to clean project: Failed to delete /Users/didip/oss/druid-didip/server/target -> [Help 1]

Am I doing something wrong? Why compile task is not idempotent?

Gian Merlino

09/13/2022, 4:46 PM

hmm. for the first one you might need to do

mvn install

instead of

mvn compile

. (if it's trying to read from your local repository,

install

would put it there.)

Gian Merlino

09/13/2022, 4:46 PM

for the second one, i'm not sure. seems odd for

mvn clean

to fail and i have not encountered that before

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