com.amazonaws.services.cloudfront.model.AmazonCloudFrontException: 2 validation errors detected: Value null at 'invalidationBatch.callerReference' failed to satisfy constraint: Member must not be null; Value null at 'invalidationBatch.paths.quantity' failed to satisfy constraint: Member must not be null (Service: AmazonCloudFront; Status Code: 400; Error Code: MalformedXML; Request ID: 4a532580-a5b7-11e6-804e-79f0aab025c3)
	at com.amazonaws.http.AmazonHttpClient.handleErrorResponse(AmazonHttpClient.java:1343)
	at com.amazonaws.http.AmazonHttpClient.executeOneRequest(AmazonHttpClient.java:961)
	at com.amazonaws.http.AmazonHttpClient.executeHelper(AmazonHttpClient.java:738)
	at com.amazonaws.http.AmazonHttpClient.doExecute(AmazonHttpClient.java:489)
	at com.amazonaws.http.AmazonHttpClient.executeWithTimer(AmazonHttpClient.java:448)
	at com.amazonaws.http.AmazonHttpClient.execute(AmazonHttpClient.java:397)
	at com.amazonaws.http.AmazonHttpClient.execute(AmazonHttpClient.java:378)
	at com.amazonaws.services.cloudfront.AmazonCloudFrontClient.doInvoke(AmazonCloudFrontClient.java:1765)
	at com.amazonaws.services.cloudfront.AmazonCloudFrontClient.invoke(AmazonCloudFrontClient.java:1741)
	at com.amazonaws.services.cloudfront.AmazonCloudFrontClient.createInvalidation(AmazonCloudFrontClient.java:583)
	at de.taimos.pipeline.aws.CFInvalidateStep$Execution.run(CFInvalidateStep.java:99)
	at de.taimos.pipeline.aws.CFInvalidateStep$Execution.run(CFInvalidateStep.java:80)
	at org.jenkinsci.plugins.workflow.steps.AbstractSynchronousStepExecution.start(AbstractSynchronousStepExecution.java:40)
	at org.jenkinsci.plugins.workflow.cps.DSL.invokeStep(DSL.java:184)