Error with gcloud-java-datastore

Hey all,

I am facing some issues with the google datastore sdk. It looks like some incompatibilities with packaged proto classes. The error I am seeing is:

java.lang.VerifyError: Bad return type Exception Details: Location: com/google/cloud/datastore/PathElement.toPb()Lcom/google/protobuf/GeneratedMessage; @4: areturn Reason: Type 'com/google/datastore/v1/Key$PathElement' (current frame, stack[0]) is not assignable to 'com/google/protobuf/GeneratedMessage' (from method signature) Current Frame: bci: @4 flags: { } locals: { 'com/google/cloud/datastore/PathElement' } stack: { 'com/google/datastore/v1/Key$PathElement' }

Has anyone seen that issue?

@kpysniak

Hi @kpysniak, thanks for the report.

This seems like a duplicate of #1239. Are you using protobuf-java >= 3.0.0? The cause of this error is that protobuf-java 3.0.0 introduced a breaking change with respect to previous betas we still depend on protobuf-java 3.0.0-beta3. We are working on a fix (e.g. updating to 3.0.0 in our code and all our dependencies) and hope to release a new version of google-cloud-java soon.

At the moment, I tried including only this:
libraryDependencies += "com.google.cloud" % "google-cloud" % "0.3.0"

but that didn't work. I also tried adding:
libraryDependencies += "com.google.protobuf" % "protobuf-java" % "3.0.0-beta-3"

but it didn't help. Would you suggest any next steps?

When I tried with protobuf-java 3.0.0-beta-3, I am getting another error:

Caused by: java.lang.IllegalArgumentException: can't parse argument number:
at java.text.MessageFormat.makeFormat(MessageFormat.java:1429) ~[na:1.8.0_25]
at java.text.MessageFormat.applyPattern(MessageFormat.java:479) ~[na:1.8.0_25]
at java.text.MessageFormat.(MessageFormat.java:362) ~[na:1.8.0_25]
at java.text.MessageFormat.format(MessageFormat.java:840) ~[na:1.8.0_25]
at org.slf4j.bridge.SLF4JBridgeHandler.getMessageI18N(SLF4JBridgeHandler.java:264) ~[jul-to-slf4j-1.7.12.jar:1.7.12]
at org.slf4j.bridge.SLF4JBridgeHandler.callLocationAwareLogger(SLF4JBridgeHandler.java:220) ~[jul-to-slf4j-1.7.12.jar:1.7.12]
at org.slf4j.bridge.SLF4JBridgeHandler.publish(SLF4JBridgeHandler.java:297) ~[jul-to-slf4j-1.7.12.jar:1.7.12]
at java.util.logging.Logger.log(Logger.java:738) ~[na:1.8.0_25]
at java.util.logging.Logger.doLog(Logger.java:765) ~[na:1.8.0_25]
at java.util.logging.Logger.log(Logger.java:830) ~[na:1.8.0_25]
at com.google.protobuf.CodedOutputStream.getUnsafe(CodedOutputStream.java:2632) ~[protobuf-java-3.0.0-beta-3.jar:na]
at com.google.protobuf.CodedOutputStream.(CodedOutputStream.java:62) ~[protobuf-java-3.0.0-beta-3.jar:na]
... 56 common frames omitted
Caused by: java.lang.NumberFormatException: For input string: ""
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65) ~[na:1.8.0_25]
at java.lang.Integer.parseInt(Integer.java:592) ~[na:1.8.0_25]
at java.lang.Integer.parseInt(Integer.java:615) ~[na:1.8.0_25]
at java.text.MessageFormat.makeFormat(MessageFormat.java:1427) ~[na:1.8.0_25]
... 67 common frames omitted

Could they be related?

I am confused, the errors are unrelated and I don't see why you should include protobuf-java 3.0.0-beta-3 since google-cloud-java already has it as a dependency. Can you share the full list of dependencies that you are using when the error in your first post happens?

Issue #1239 was fixed in google-cloud 0.4.0 and this issue is missing information required to identify its cause. Feel free to reopen with more details in case you are still experiencing it with google-cloud 0.4.0.