BUILD FAIL

[sonlahe140994]

I have installed Azkaban and I get an issue that can not run successfully first command "./gradlew build". Here is error logs.

son.le1@DU-AI-SONLA1:~/Desktop/Azkaban/azkaban$ ./gradlew build
Configuration on demand is an incubating feature.

Task :azkaban-web-server:restliTemplateGenerator
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.

Task :az-flow-trigger-dependency-plugin:compileJava FAILED
/home/son.le1/Desktop/Azkaban/azkaban/az-flow-trigger-dependency-plugin/src/main/java/azkaban/flowtrigger/DependencyPluginConfig.java:22: error: cannot access Object
public interface DependencyPluginConfig {
^
bad class file: /modules/java.base/java/lang/Object.class
class file has wrong version 55.0, should be 53.0
Please remove or make sure it appears in the correct subdirectory of the classpath.
1 error

Task :cached-http-filesystem:compileJava FAILED
/home/son.le1/Desktop/Azkaban/azkaban/cached-http-filesystem/src/main/java/azkaban/cachedhttpfilesystem/CachedHttpFileSystem.java:21: error: cannot access FileNotFoundException
import java.io.FileNotFoundException;
^
bad class file: /modules/java.base/java/io/FileNotFoundException.class
class file has wrong version 55.0, should be 53.0
Please remove or make sure it appears in the correct subdirectory of the classpath.
1 error

Task :az-crypto:compileJava FAILED
/home/son.le1/Desktop/Azkaban/azkaban/az-crypto/src/main/java/azkaban/crypto/Decryptions.java:15: error: cannot access BufferedReader
import java.io.BufferedReader;
^
bad class file: /modules/java.base/java/io/BufferedReader.class
class file has wrong version 55.0, should be 53.0
Please remove or make sure it appears in the correct subdirectory of the classpath.
1 error

Task :az-core:compileJava FAILED
/home/son.le1/Desktop/Azkaban/azkaban/az-core/src/main/java/azkaban/Constants.java:19: error: cannot access Duration
import java.time.Duration;
^
bad class file: /modules/java.base/java/time/Duration.class
class file has wrong version 55.0, should be 53.0
Please remove or make sure it appears in the correct subdirectory of the classpath.
1 error

FAILURE: Build completed with 4 failures.

1: Task failed with an exception.

• What went wrong:
  Execution failed for task ':az-flow-trigger-dependency-plugin:compileJava'.

Compilation failed with exit code 1; see the compiler error output for details.

• Try:
  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
  ==============================================================================

2: Task failed with an exception.

• What went wrong:
  Execution failed for task ':cached-http-filesystem:compileJava'.

Compilation failed with exit code 1; see the compiler error output for details.

• Try:
  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
  ==============================================================================

3: Task failed with an exception.

• What went wrong:
  Execution failed for task ':az-crypto:compileJava'.

Compilation failed with exit code 1; see the compiler error output for details.

• Try:
  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
  ==============================================================================

4: Task failed with an exception.

• What went wrong:
  Execution failed for task ':az-core:compileJava'.

Compilation failed with exit code 1; see the compiler error output for details.

• Try:
  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
  ==============================================================================

• Get more help at https://help.gradle.org

Deprecated Gradle features were used in this build, making it incompatible with Gradle 6.0.
Use '--warning-mode all' to show the individual deprecation warnings.
See https://docs.gradle.org/5.0/userguide/command_line_interface.html#sec:command_line_warnings

BUILD FAILED in 1s
26 actionable tasks: 7 executed, 19 up-to-date

Anyone can help me how to fix this issue?

[finviman]

Same problem , I use JDK11(55), I think the Object.class is version 11, but gradle wants to build azkaban with jdk9(53), so it can not recognize version 55, but where is jdk9?