# Cannot exercise contract with Java API to DAML Hub

**URL:** <https://forum.canton.network/t/cannot-exercise-contract-with-java-api-to-daml-hub/6023>\
**Category:** App Development\
**Tags:** damlhub\
**Created:** [January 24, 2023, 10:17pm UTC](https://forum.canton.network/t/cannot-exercise-contract-with-java-api-to-daml-hub/6023 "2023-01-24T22:17:17Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![mundacho](https://avatars.discourse-cdn.com/v4/letter/m/34f0e0/32.png) [@mundacho](https://forum.canton.network/u/mundacho)\
**Post date:** [January 24, 2023, 10:17pm UTC](https://forum.canton.network/t/cannot-exercise-contract-with-java-api-to-daml-hub/6023/1 "2023-01-24T22:17:17Z")

</div>

Hello,

I have a DAML app that I’m deploying to DAML hub. I’ve a Java application that interacts with the ledger using the Java bindings. In local testing, everything works well. In Daml hub, my Java app captures the reactive stream and reacts accordingly, but when it sends a command through the stream as follows:

```haskell
        damlAppContext.client
          .getCommandClient()
          .submitAndWait(
            tx.getWorkflowId(),
            damlAppContext.appId,
            UUID.randomUUID().toString(),
            damlAppContext.operatorParty,
            exerciseCommands
          )

```

The command is not executed on the ledger. I have tried to launch my application using a service account as the UserAdmin and using Public, using both the JWT tokens that one can obtain in the graphical user interface and also using the login service for service parties:

```haskell
curl -XPOST -H "Authorization: Basic <token>" https://jydb93d0be1ss4vw.daml.app/.hub/v1/sa/login

```

I’m really out of options for what to test next. From the client side, there is no Could it be that the appId is wrong? After a while I get the following exception:

```haskell
io.reactivex.exceptions.OnErrorNotImplementedException: INTERNAL: RST_STREAM closed stream. HTTP/2 error code: INTERNAL_ERROR
        at io.reactivex.internal.functions.Functions$OnErrorMissingConsumer.accept(Functions.java:704)
        at io.reactivex.internal.functions.Functions$OnErrorMissingConsumer.accept(Functions.java:701)
        at io.reactivex.internal.subscribers.LambdaSubscriber.onError(LambdaSubscriber.java:79)
        at io.reactivex.internal.operators.flowable.FlowableFlattenIterable$FlattenIterableSubscriber.checkTerminated(FlowableFlattenIterable.java:396)
        at io.reactivex.internal.operators.flowable.FlowableFlattenIterable$FlattenIterableSubscriber.drain(FlowableFlattenIterable.java:256)
        at io.reactivex.internal.operators.flowable.FlowableFlattenIterable$FlattenIterableSubscriber.onError(FlowableFlattenIterable.java:182)
        at io.reactivex.internal.subscribers.BasicFuseableSubscriber.onError(BasicFuseableSubscriber.java:101)
        at com.daml.grpc.adapter.client.rs.BufferingResponseObserver.lambda$onError$3(BufferingResponseObserver.java:81)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
        at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: io.grpc.StatusRuntimeException: INTERNAL: RST_STREAM closed stream. HTTP/2 error code: INTERNAL_ERROR
        at io.grpc.Status.asRuntimeException(Status.java:535)
        at io.grpc.stub.ClientCalls$StreamObserverToCallListenerAdapter.onClose(ClientCalls.java:479)
        at io.grpc.internal.ClientCallImpl.closeObserver(ClientCallImpl.java:562)
        at io.grpc.internal.ClientCallImpl.access$300(ClientCallImpl.java:70)
        at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInternal(ClientCallImpl.java:743)
        at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInContext(ClientCallImpl.java:722)
        at io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37)
        at io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:133)
        ... 3 more
[client-8] ERROR com.daml.grpc.adapter.SingleThreadExecutionSequencer - Unhandled exception in SingleThreadExecutionSequencer.
io.reactivex.exceptions.OnErrorNotImplementedException: INTERNAL: RST_STREAM closed stream. HTTP/2 error code: INTERNAL_ERROR
        at io.reactivex.internal.functions.Functions$OnErrorMissingConsumer.accept(Functions.java:704)
        at io.reactivex.internal.functions.Functions$OnErrorMissingConsumer.accept(Functions.java:701)
        at io.reactivex.internal.subscribers.LambdaSubscriber.onError(LambdaSubscriber.java:79)
        at io.reactivex.internal.operators.flowable.FlowableFlattenIterable$FlattenIterableSubscriber.checkTerminated(FlowableFlattenIterable.java:396)
        at io.reactivex.internal.operators.flowable.FlowableFlattenIterable$FlattenIterableSubscriber.drain(FlowableFlattenIterable.java:256)
        at io.reactivex.internal.operators.flowable.FlowableFlattenIterable$FlattenIterableSubscriber.onError(FlowableFlattenIterable.java:182)
        at io.reactivex.internal.subscribers.BasicFuseableSubscriber.onError(BasicFuseableSubscriber.java:101)
        at com.daml.grpc.adapter.client.rs.BufferingResponseObserver.lambda$onError$3(BufferingResponseObserver.java:81)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
        at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: io.grpc.StatusRuntimeException: INTERNAL: RST_STREAM closed stream. HTTP/2 error code: INTERNAL_ERROR
        at io.grpc.Status.asRuntimeException(Status.java:535)
        at io.grpc.stub.ClientCalls$StreamObserverToCallListenerAdapter.onClose(ClientCalls.java:479)
        at io.grpc.internal.ClientCallImpl.closeObserver(ClientCallImpl.java:562)
        at io.grpc.internal.ClientCallImpl.access$300(ClientCallImpl.java:70)
        at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInternal(ClientCallImpl.java:743)
        at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInContext(ClientCallImpl.java:722)
        at io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37)
        at io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:133)
        ... 3 more
io.reactivex.exceptions.OnErrorNotImplementedException: INTERNAL: RST_STREAM closed stream. HTTP/2 error code: INTERNAL_ERROR
        at io.reactivex.internal.functions.Functions$OnErrorMissingConsumer.accept(Functions.java:704)
        at io.reactivex.internal.functions.Functions$OnErrorMissingConsumer.accept(Functions.java:701)
        at io.reactivex.internal.subscribers.LambdaSubscriber.onError(LambdaSubscriber.java:79)
        at io.reactivex.internal.operators.flowable.FlowableFlattenIterable$FlattenIterableSubscriber.checkTerminated(FlowableFlattenIterable.java:396)
        at io.reactivex.internal.operators.flowable.FlowableFlattenIterable$FlattenIterableSubscriber.drain(FlowableFlattenIterable.java:256)
        at io.reactivex.internal.operators.flowable.FlowableFlattenIterable$FlattenIterableSubscriber.onError(FlowableFlattenIterable.java:182)
        at io.reactivex.internal.subscribers.BasicFuseableSubscriber.onError(BasicFuseableSubscriber.java:101)
        at com.daml.grpc.adapter.client.rs.BufferingResponseObserver.lambda$onError$3(BufferingResponseObserver.java:81)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
        at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: io.grpc.StatusRuntimeException: INTERNAL: RST_STREAM closed stream. HTTP/2 error code: INTERNAL_ERROR
        at io.grpc.Status.asRuntimeException(Status.java:535)
        at io.grpc.stub.ClientCalls$StreamObserverToCallListenerAdapter.onClose(ClientCalls.java:479)
        at io.grpc.internal.ClientCallImpl.closeObserver(ClientCallImpl.java:562)
        at io.grpc.internal.ClientCallImpl.access$300(ClientCallImpl.java:70)
        at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInternal(ClientCallImpl.java:743)
        at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInContext(ClientCallImpl.java:722)
        at io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37)
        at io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:133)
        ... 3 more
[client-0] ERROR com.daml.grpc.adapter.SingleThreadExecutionSequencer - Unhandled exception in SingleThreadExecutionSequencer.
io.reactivex.exceptions.OnErrorNotImplementedException: INTERNAL: RST_STREAM closed stream. HTTP/2 error code: INTERNAL_ERROR
        at io.reactivex.internal.functions.Functions$OnErrorMissingConsumer.accept(Functions.java:704)
        at io.reactivex.internal.functions.Functions$OnErrorMissingConsumer.accept(Functions.java:701)
        at io.reactivex.internal.subscribers.LambdaSubscriber.onError(LambdaSubscriber.java:79)
        at io.reactivex.internal.operators.flowable.FlowableFlattenIterable$FlattenIterableSubscriber.checkTerminated(FlowableFlattenIterable.java:396)
        at io.reactivex.internal.operators.flowable.FlowableFlattenIterable$FlattenIterableSubscriber.drain(FlowableFlattenIterable.java:256)
        at io.reactivex.internal.operators.flowable.FlowableFlattenIterable$FlattenIterableSubscriber.onError(FlowableFlattenIterable.java:182)
        at io.reactivex.internal.subscribers.BasicFuseableSubscriber.onError(BasicFuseableSubscriber.java:101)
        at com.daml.grpc.adapter.client.rs.BufferingResponseObserver.lambda$onError$3(BufferingResponseObserver.java:81)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
        at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: io.grpc.StatusRuntimeException: INTERNAL: RST_STREAM closed stream. HTTP/2 error code: INTERNAL_ERROR
        at io.grpc.Status.asRuntimeException(Status.java:535)
        at io.grpc.stub.ClientCalls$StreamObserverToCallListenerAdapter.onClose(ClientCalls.java:479)
        at io.grpc.internal.ClientCallImpl.closeObserver(ClientCallImpl.java:562)
        at io.grpc.internal.ClientCallImpl.access$300(ClientCallImpl.java:70)
        at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInternal(ClientCallImpl.java:743)
        at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInContext(ClientCallImpl.java:722)
        at io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37)
        at io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:133)
        ... 3 more
io.reactivex.exceptions.OnErrorNotImplementedException: INTERNAL: RST_STREAM closed stream. HTTP/2 error code: INTERNAL_ERROR
        at io.reactivex.internal.functions.Functions$OnErrorMissingConsumer.accept(Functions.java:704)
        at io.reactivex.internal.functions.Functions$OnErrorMissingConsumer.accept(Functions.java:701)
        at io.reactivex.internal.subscribers.LambdaSubscriber.onError(LambdaSubscriber.java:79)
        at io.reactivex.internal.operators.flowable.FlowableFlattenIterable$FlattenIterableSubscriber.checkTerminated(FlowableFlattenIterable.java:396)
        at io.reactivex.internal.operators.flowable.FlowableFlattenIterable$FlattenIterableSubscriber.drain(FlowableFlattenIterable.java:256)
        at io.reactivex.internal.operators.flowable.FlowableFlattenIterable$FlattenIterableSubscriber.onError(FlowableFlattenIterable.java:182)
        at io.reactivex.internal.subscribers.BasicFuseableSubscriber.onError(BasicFuseableSubscriber.java:101)
        at com.daml.grpc.adapter.client.rs.BufferingResponseObserver.lambda$onError$3(BufferingResponseObserver.java:81)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
        at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: io.grpc.StatusRuntimeException: INTERNAL: RST_STREAM closed stream. HTTP/2 error code: INTERNAL_ERROR
        at io.grpc.Status.asRuntimeException(Status.java:535)
        at io.grpc.stub.ClientCalls$StreamObserverToCallListenerAdapter.onClose(ClientCalls.java:479)
        at io.grpc.internal.ClientCallImpl.closeObserver(ClientCallImpl.java:562)
        at io.grpc.internal.ClientCallImpl.access$300(ClientCallImpl.java:70)
        at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInternal(ClientCallImpl.java:743)
        at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInContext(ClientCallImpl.java:722)
        at io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37)
        at io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:133)
        ... 3 more
io.reactivex.exceptions.OnErrorNotImplementedException: INTERNAL: RST_STREAM closed stream. HTTP/2 error code: INTERNAL_ERROR
        at io.reactivex.internal.functions.Functions$OnErrorMissingConsumer.accept(Functions.java:704)
        at io.reactivex.internal.functions.Functions$OnErrorMissingConsumer.accept(Functions.java:701)
        at io.reactivex.internal.subscribers.LambdaSubscriber.onError(LambdaSubscriber.java:79)
        at io.reactivex.internal.operators.flowable.FlowableFlattenIterable$FlattenIterableSubscriber.checkTerminated(FlowableFlattenIterable.java:396)
        at io.reactivex.internal.operators.flowable.FlowableFlattenIterable$FlattenIterableSubscriber.drain(FlowableFlattenIterable.java:256)
        at io.reactivex.internal.operators.flowable.FlowableFlattenIterable$FlattenIterableSubscriber.onError(FlowableFlattenIterable.java:182)
        at io.reactivex.internal.subscribers.BasicFuseableSubscriber.onError(BasicFuseableSubscriber.java:101)
        at com.daml.grpc.adapter.client.rs.BufferingResponseObserver.lambda$onError$3(BufferingResponseObserver.java:81)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
        at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: io.grpc.StatusRuntimeException: INTERNAL: RST_STREAM closed stream. HTTP/2 error code: INTERNAL_ERROR
        at io.grpc.Status.asRuntimeException(Status.java:535)
        at io.grpc.stub.ClientCalls$StreamObserverToCallListenerAdapter.onClose(ClientCalls.java:479)
        at io.grpc.internal.ClientCallImpl.closeObserver(ClientCallImpl.java:562)
        at io.grpc.internal.ClientCallImpl.access$300(ClientCallImpl.java:70)
        at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInternal(ClientCallImpl.java:743)
        at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInContext(ClientCallImpl.java:722)
        at io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37)
        at io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:133)
        ... 3 more
io.reactivex.exceptions.OnErrorNotImplementedException: INTERNAL: RST_STREAM closed stream. HTTP/2 error code: INTERNAL_ERROR
        at io.reactivex.internal.functions.Functions$OnErrorMissingConsumer.accept(Functions.java:704)
        at io.reactivex.internal.functions.Functions$OnErrorMissingConsumer.accept(Functions.java:701)
        at io.reactivex.internal.subscribers.LambdaSubscriber.onError(LambdaSubscriber.java:79)
        at io.reactivex.internal.operators.flowable.FlowableFlattenIterable$FlattenIterableSubscriber.checkTerminated(FlowableFlattenIterable.java:396)
        at io.reactivex.internal.operators.flowable.FlowableFlattenIterable$FlattenIterableSubscriber.drain(FlowableFlattenIterable.java:256)
        at io.reactivex.internal.operators.flowable.FlowableFlattenIterable$FlattenIterableSubscriber.onError(FlowableFlattenIterable.java:182)
        at io.reactivex.internal.subscribers.BasicFuseableSubscriber.onError(BasicFuseableSubscriber.java:101)
        at com.daml.grpc.adapter.client.rs.BufferingResponseObserver.lambda$onError$3(BufferingResponseObserver.java:81)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
        at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: io.grpc.StatusRuntimeException: INTERNAL: RST_STREAM closed stream. HTTP/2 error code: INTERNAL_ERROR
        at io.grpc.Status.asRuntimeException(Status.java:535)
        at io.grpc.stub.ClientCalls$StreamObserverToCallListenerAdapter.onClose(ClientCalls.java:479)
        at io.grpc.internal.ClientCallImpl.closeObserver(ClientCallImpl.java:562)
        at io.grpc.internal.ClientCallImpl.access$300(ClientCallImpl.java:70)
        at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInternal(ClientCallImpl.java:743)
        at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInContext(ClientCallImpl.java:722)
        at io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37)
        at io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:133)
        ... 3 more
[client-1] ERROR com.daml.grpc.adapter.SingleThreadExecutionSequencer - Unhandled exception in SingleThreadExecutionSequencer.
io.reactivex.exceptions.OnErrorNotImplementedException: INTERNAL: RST_STREAM closed stream. HTTP/2 error code: INTERNAL_ERROR
        at io.reactivex.internal.functions.Functions$OnErrorMissingConsumer.accept(Functions.java:704)
        at io.reactivex.internal.functions.Functions$OnErrorMissingConsumer.accept(Functions.java:701)
        at io.reactivex.internal.subscribers.LambdaSubscriber.onError(LambdaSubscriber.java:79)
        at io.reactivex.internal.operators.flowable.FlowableFlattenIterable$FlattenIterableSubscriber.checkTerminated(FlowableFlattenIterable.java:396)
        at io.reactivex.internal.operators.flowable.FlowableFlattenIterable$FlattenIterableSubscriber.drain(FlowableFlattenIterable.java:256)
        at io.reactivex.internal.operators.flowable.FlowableFlattenIterable$FlattenIterableSubscriber.onError(FlowableFlattenIterable.java:182)
        at io.reactivex.internal.subscribers.BasicFuseableSubscriber.onError(BasicFuseableSubscriber.java:101)
        at com.daml.grpc.adapter.client.rs.BufferingResponseObserver.lambda$onError$3(BufferingResponseObserver.java:81)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
        at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: io.grpc.StatusRuntimeException: INTERNAL: RST_STREAM closed stream. HTTP/2 error code: INTERNAL_ERROR
        at io.grpc.Status.asRuntimeException(Status.java:535)
        at io.grpc.stub.ClientCalls$StreamObserverToCallListenerAdapter.onClose(ClientCalls.java:479)
        at io.grpc.internal.ClientCallImpl.closeObserver(ClientCallImpl.java:562)
        at io.grpc.internal.ClientCallImpl.access$300(ClientCallImpl.java:70)
        at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInternal(ClientCallImpl.java:743)
        at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInContext(ClientCallImpl.java:722)
        at io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37)
        at io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:133)
        ... 3 more
[client-5] ERROR com.daml.grpc.adapter.SingleThreadExecutionSequencer - Unhandled exception in SingleThreadExecutionSequencer.
io.reactivex.exceptions.OnErrorNotImplementedException: INTERNAL: RST_STREAM closed stream. HTTP/2 error code: INTERNAL_ERROR
        at io.reactivex.internal.functions.Functions$OnErrorMissingConsumer.accept(Functions.java:704)
        at io.reactivex.internal.functions.Functions$OnErrorMissingConsumer.accept(Functions.java:701)
        at io.reactivex.internal.subscribers.LambdaSubscriber.onError(LambdaSubscriber.java:79)
        at io.reactivex.internal.operators.flowable.FlowableFlattenIterable$FlattenIterableSubscriber.checkTerminated(FlowableFlattenIterable.java:396)
        at io.reactivex.internal.operators.flowable.FlowableFlattenIterable$FlattenIterableSubscriber.drain(FlowableFlattenIterable.java:256)
        at io.reactivex.internal.operators.flowable.FlowableFlattenIterable$FlattenIterableSubscriber.onError(FlowableFlattenIterable.java:182)
        at io.reactivex.internal.subscribers.BasicFuseableSubscriber.onError(BasicFuseableSubscriber.java:101)
        at com.daml.grpc.adapter.client.rs.BufferingResponseObserver.lambda$onError$3(BufferingResponseObserver.java:81)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
        at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: io.grpc.StatusRuntimeException: INTERNAL: RST_STREAM closed stream. HTTP/2 error code: INTERNAL_ERROR
        at io.grpc.Status.asRuntimeException(Status.java:535)
        at io.grpc.stub.ClientCalls$StreamObserverToCallListenerAdapter.onClose(ClientCalls.java:479)
        at io.grpc.internal.ClientCallImpl.closeObserver(ClientCallImpl.java:562)
        at io.grpc.internal.ClientCallImpl.access$300(ClientCallImpl.java:70)
        at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInternal(ClientCallImpl.java:743)
        at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInContext(ClientCallImpl.java:722)
        at io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37)
        at io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:133)
        ... 3 more
[client-6] ERROR com.daml.grpc.adapter.SingleThreadExecutionSequencer - Unhandled exception in SingleThreadExecutionSequencer.
io.reactivex.exceptions.OnErrorNotImplementedException: INTERNAL: RST_STREAM closed stream. HTTP/2 error code: INTERNAL_ERROR
        at io.reactivex.internal.functions.Functions$OnErrorMissingConsumer.accept(Functions.java:704)
        at io.reactivex.internal.functions.Functions$OnErrorMissingConsumer.accept(Functions.java:701)
        at io.reactivex.internal.subscribers.LambdaSubscriber.onError(LambdaSubscriber.java:79)
        at io.reactivex.internal.operators.flowable.FlowableFlattenIterable$FlattenIterableSubscriber.checkTerminated(FlowableFlattenIterable.java:396)
        at io.reactivex.internal.operators.flowable.FlowableFlattenIterable$FlattenIterableSubscriber.drain(FlowableFlattenIterable.java:256)
        at io.reactivex.internal.operators.flowable.FlowableFlattenIterable$FlattenIterableSubscriber.onError(FlowableFlattenIterable.java:182)
        at io.reactivex.internal.subscribers.BasicFuseableSubscriber.onError(BasicFuseableSubscriber.java:101)
        at com.daml.grpc.adapter.client.rs.BufferingResponseObserver.lambda$onError$3(BufferingResponseObserver.java:81)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
        at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: io.grpc.StatusRuntimeException: INTERNAL: RST_STREAM closed stream. HTTP/2 error code: INTERNAL_ERROR
        at io.grpc.Status.asRuntimeException(Status.java:535)
        at io.grpc.stub.ClientCalls$StreamObserverToCallListenerAdapter.onClose(ClientCalls.java:479)
        at io.grpc.internal.ClientCallImpl.closeObserver(ClientCallImpl.java:562)
        at io.grpc.internal.ClientCallImpl.access$300(ClientCallImpl.java:70)
        at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInternal(ClientCallImpl.java:743)
        at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInContext(ClientCallImpl.java:722)
        at io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37)
        at io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:133)
        ... 3 more

```

---

<div class="post-metadata">

**Author:** ![Mate\_Varga](https://yyz2.discourse-cdn.com/flex034/user_avatar/forum.canton.network/mate_varga/32/2308_2.png) [@Mate\_Varga](https://forum.canton.network/u/Mate_Varga)\
**Post date:** [January 25, 2023, 7:08am UTC](https://forum.canton.network/t/cannot-exercise-contract-with-java-api-to-daml-hub/6023/2 "2023-01-25T07:08:34Z")

</div>

Hi @mundacho,

Could you please confirm that you are using the same application ID in both your token and the command submission? The only SubmitAndWait submission that I could find in the logs fail with:

```haskell
PERMISSION_DENIED(7,0): Claims are only valid for applicationId 'damlhub', actual applicationId is 'toplBrokerApp'

```

When a command fails, you usually get a rejection (either an error, or timing out), you should implement at least logging of these rejections/responses.

---

<div class="post-metadata">

**Author:** ![mundacho](https://avatars.discourse-cdn.com/v4/letter/m/34f0e0/32.png) [@mundacho](https://forum.canton.network/u/mundacho)\
**Post date:** [January 25, 2023, 3:39pm UTC](https://forum.canton.network/t/cannot-exercise-contract-with-java-api-to-daml-hub/6023/3 "2023-01-25T15:39:31Z")

</div>

Hello,

Setting the applicationId to `damlhub` solved the problem when submitting the command. The command executed successfully. It would be a good idea to state that requirement in the documentation for DAML Hub (or to make it more visible if it is already there). Thank you!

I’ll double check my code to see why no exception was logged.

---

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**Author:** ![mundacho](https://avatars.discourse-cdn.com/v4/letter/m/34f0e0/32.png) [@mundacho](https://forum.canton.network/u/mundacho)\
**Post date:** [January 25, 2023, 9:20pm UTC](https://forum.canton.network/t/cannot-exercise-contract-with-java-api-to-daml-hub/6023/4 "2023-01-25T21:20:42Z")

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I found the part of the documentation where it says to use the ‘damlhub’ application Id: [https://hub.daml.com/docs/api/#section/Authentication-and-Client-Configuration](https://hub.daml.com/docs/api/#section/Authentication-and-Client-Configuration) , I was not aware of this, sorry.

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<div class="post-metadata">

**Author:** ![Daniel\_Porter](https://yyz2.discourse-cdn.com/flex034/user_avatar/forum.canton.network/daniel_porter/32/1171_2.png) [@Daniel\_Porter](https://forum.canton.network/u/Daniel_Porter)\
**Post date:** [January 25, 2023, 9:54pm UTC](https://forum.canton.network/t/cannot-exercise-contract-with-java-api-to-daml-hub/6023/5 "2023-01-25T21:54:08Z")

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No worries, it’s not obvious - the whole applicationId thing throws people for a loop. I will consider how we can more effectively document it.

Additionally, something that maybe isn’t effectively documented - you can see the live participant logs yourself under the “Deployments” tab in Hub. See attached screenshot.

 ![image](https://canada1.discourse-cdn.com/flex028/uploads/daml/original/2X/1/1cba23cf08c0f288030338d1da22081874408262.png)