Sometimes ClassNotFound exception: android.support.v4.app.Fragment

[alosich]

Periodically getting such errors:

13:41:05.795 [INFO] [system.out] java.lang.RuntimeException: java.lang.TypeNotPresentException: Type android.support.v4.app.Fragment not present
13:41:05.795 [INFO] [system.out]    at net.orfjackal.retrolambda.lambdas.LambdaReifier.reifyLambdaClass(LambdaReifier.java:42)
13:41:05.795 [INFO] [system.out]    at net.orfjackal.retrolambda.lambdas.BackportLambdaInvocations$InvokeDynamicInsnConverter.backportLambda(BackportLambdaInvocations.java:118)
13:41:05.795 [INFO] [system.out]    at net.orfjackal.retrolambda.lambdas.BackportLambdaInvocations$InvokeDynamicInsnConverter.visitInvokeDynamicInsn(BackportLambdaInvocations.java:107)
13:41:05.795 [INFO] [system.out]    at net.orfjackal.retrolambda.asm.ClassReader.readCode(ClassReader.java:1452)
13:41:05.795 [INFO] [system.out]    at net.orfjackal.retrolambda.asm.ClassReader.readMethod(ClassReader.java:1017)
13:41:05.795 [INFO] [system.out]    at net.orfjackal.retrolambda.asm.ClassReader.accept(ClassReader.java:693)
13:41:05.795 [INFO] [system.out]    at net.orfjackal.retrolambda.asm.ClassReader.accept(ClassReader.java:506)
13:41:05.796 [INFO] [system.out]    at net.orfjackal.retrolambda.Transformers.lambda$transform$4(Transformers.java:106)
13:41:05.796 [INFO] [system.out]    at net.orfjackal.retrolambda.Transformers.transform(Transformers.java:121)
13:41:05.796 [INFO] [system.out]    at net.orfjackal.retrolambda.Transformers.transform(Transformers.java:106)
13:41:05.796 [INFO] [system.out]    at net.orfjackal.retrolambda.Transformers.backportClass(Transformers.java:46)
13:41:05.796 [INFO] [system.out]    at net.orfjackal.retrolambda.Retrolambda.run(Retrolambda.java:77)
13:41:05.796 [INFO] [system.out]    at net.orfjackal.retrolambda.Main.main(Main.java:26)
13:41:05.796 [INFO] [system.out] Caused by: java.lang.TypeNotPresentException: Type android.support.v4.app.Fragment not present
13:41:05.796 [INFO] [system.out]    at sun.invoke.util.BytecodeDescriptor.parseSig(BytecodeDescriptor.java:85)
13:41:05.796 [INFO] [system.out]    at sun.invoke.util.BytecodeDescriptor.parseMethod(BytecodeDescriptor.java:54)
13:41:05.796 [INFO] [system.out]    at sun.invoke.util.BytecodeDescriptor.parseMethod(BytecodeDescriptor.java:41)
13:41:05.796 [INFO] [system.out]    at java.lang.invoke.MethodType.fromMethodDescriptorString(MethodType.java:1067)
13:41:05.796 [INFO] [system.out]    at net.orfjackal.retrolambda.lambdas.Types.toMethodType(Types.java:33)
13:41:05.796 [INFO] [system.out]    at net.orfjackal.retrolambda.lambdas.LambdaReifier.callBootstrapMethod(LambdaReifier.java:104)
13:41:05.796 [INFO] [system.out]    at net.orfjackal.retrolambda.lambdas.LambdaReifier.reifyLambdaClass(LambdaReifier.java:37)
13:41:05.796 [INFO] [system.out]    ... 12 more
13:41:05.796 [INFO] [system.out] Caused by: java.lang.ClassNotFoundException: android.support.v4.app.Fragment
13:41:05.796 [INFO] [system.out]    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
13:41:05.796 [INFO] [system.out]    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
13:41:05.796 [INFO] [system.out]    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
13:41:05.796 [INFO] [system.out]    at net.orfjackal.retrolambda.NonDelegatingClassLoader.loadClass(NonDelegatingClassLoader.java:27)
13:41:05.796 [INFO] [system.out]    at sun.invoke.util.BytecodeDescriptor.parseSig(BytecodeDescriptor.java:83)
13:41:05.796 [INFO] [system.out]    ... 18 more
13:41:05.804 [DEBUG] [org.gradle.process.internal.DefaultExecHandle] Changing state to: FAILED
13:41:05.804 [DEBUG] [org.gradle.process.internal.DefaultExecHandle] Process 'command '/usr/lib/jvm/java-8-jdk/bin/java'' finished with exit value 1 (state: FAILED)

doing clean fixes problem for some time.