com.google.cloud.spanner.InstanceNotFoundException: 
NOT_FOUND: com.google.api.gax.rpc.NotFoundException: io.grpc.StatusRuntimeException: NOT_FOUND: Instance not found: projects/java-docs-samples-testing/instances/spanner-testing-east1
resource_type: "type.googleapis.com/google.spanner.admin.instance.v1.Instance"
resource_name: "projects/java-docs-samples-testing/instances/spanner-testing-east1"
description: "Instance does not exist."
at com.google.cloud.spanner.SpannerExceptionFactory.newSpannerExceptionPreformatted(SpannerExceptionFactory.java:279)
at com.google.cloud.spanner.SpannerExceptionFactory.newSpannerException(SpannerExceptionFactory.java:61)
at com.google.cloud.spanner.SpannerExceptionFactory.newSpannerException(SpannerExceptionFactory.java:181)
at com.google.cloud.spanner.spi.v1.GapicSpannerRpc.get(GapicSpannerRpc.java:1682)
at com.google.cloud.spanner.spi.v1.GapicSpannerRpc.lambda$dropDatabase$10(GapicSpannerRpc.java:1174)
at com.google.api.gax.retrying.DirectRetryingExecutor.submit(DirectRetryingExecutor.java:105)
at com.google.cloud.RetryHelper.run(RetryHelper.java:76)
at com.google.cloud.RetryHelper.runWithRetries(RetryHelper.java:50)
at com.google.cloud.spanner.spi.v1.GapicSpannerRpc.runWithRetryOnAdministrativeRequestsExceeded(GapicSpannerRpc.java:673)
at com.google.cloud.spanner.spi.v1.GapicSpannerRpc.dropDatabase(GapicSpannerRpc.java:1172)
at com.google.cloud.spanner.DatabaseAdminClientImpl.dropDatabase(DatabaseAdminClientImpl.java:347)
at com.google.cloud.spanner.Database.drop(Database.java:93)
at com.google.cloud.spanner.jdbc.it.ITJdbcPgNumericTest.teardown(ITJdbcPgNumericTest.java:91)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
at org.junit.internal.runners.statements.RunAfters.invokeMethod(RunAfters.java:46)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:33)
at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:54)
at org.junit.rules.RunRules.evaluate(RunRules.java:20)
at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
at org.junit.runners.Suite.runChild(Suite.java:128)
at org.junit.runners.Suite.runChild(Suite.java:27)
at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
at org.apache.maven.surefire.junitcore.JUnitCore.run(JUnitCore.java:55)
at org.apache.maven.surefire.junitcore.JUnitCoreWrapper.createRequestAndRun(JUnitCoreWrapper.java:137)
at org.apache.maven.surefire.junitcore.JUnitCoreWrapper.executeEager(JUnitCoreWrapper.java:107)
at org.apache.maven.surefire.junitcore.JUnitCoreWrapper.execute(JUnitCoreWrapper.java:83)
at org.apache.maven.surefire.junitcore.JUnitCoreWrapper.execute(JUnitCoreWrapper.java:75)
at org.apache.maven.surefire.junitcore.JUnitCoreProvider.invoke(JUnitCoreProvider.java:158)
at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:377)
at org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:138)
at org.apache.maven.surefire.booter.ForkedBooter.run(ForkedBooter.java:465)
at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:451)

Caused by: java.util.concurrent.ExecutionException: com.google.api.gax.rpc.NotFoundException: io.grpc.StatusRuntimeException: NOT_FOUND: Instance not found: projects/java-docs-samples-testing/instances/spanner-testing-east1

resource_type: "type.googleapis.com/google.spanner.admin.instance.v1.Instance"

resource_name: "projects/java-docs-samples-testing/instances/spanner-testing-east1"

description: "Instance does not exist."
at com.google.common.util.concurrent.AbstractFuture.getDoneValue(AbstractFuture.java:588)
at com.google.common.util.concurrent.AbstractFuture.get(AbstractFuture.java:567)
at com.google.cloud.spanner.spi.v1.GapicSpannerRpc.get(GapicSpannerRpc.java:1676)
... 41 more

Caused by: com.google.api.gax.rpc.NotFoundException: io.grpc.StatusRuntimeException: NOT_FOUND: Instance not found: projects/java-docs-samples-testing/instances/spanner-testing-east1

resource_type: "type.googleapis.com/google.spanner.admin.instance.v1.Instance"

resource_name: "projects/java-docs-samples-testing/instances/spanner-testing-east1"

description: "Instance does not exist."
at com.google.api.gax.rpc.ApiExceptionFactory.createException(ApiExceptionFactory.java:45)
at com.google.api.gax.grpc.GrpcApiExceptionFactory.create(GrpcApiExceptionFactory.java:72)
at com.google.api.gax.grpc.GrpcApiExceptionFactory.create(GrpcApiExceptionFactory.java:60)
at com.google.api.gax.grpc.GrpcExceptionCallable$ExceptionTransformingFuture.onFailure(GrpcExceptionCallable.java:97)
at com.google.api.core.ApiFutures$1.onFailure(ApiFutures.java:68)
at com.google.common.util.concurrent.Futures$CallbackListener.run(Futures.java:1133)
at com.google.common.util.concurrent.DirectExecutor.execute(DirectExecutor.java:31)
at com.google.common.util.concurrent.AbstractFuture.executeListener(AbstractFuture.java:1277)
at com.google.common.util.concurrent.AbstractFuture.complete(AbstractFuture.java:1038)
at com.google.common.util.concurrent.AbstractFuture.setException(AbstractFuture.java:808)
at io.grpc.stub.ClientCalls$GrpcFuture.setException(ClientCalls.java:564)
at io.grpc.stub.ClientCalls$UnaryStreamToFuture.onClose(ClientCalls.java:534)
at io.grpc.PartialForwardingClientCallListener.onClose(PartialForwardingClientCallListener.java:39)
at io.grpc.ForwardingClientCallListener.onClose(ForwardingClientCallListener.java:23)
at io.grpc.ForwardingClientCallListener$SimpleForwardingClientCallListener.onClose(ForwardingClientCallListener.java:40)
at com.google.api.gax.grpc.ChannelPool$ReleasingClientCall$1.onClose(ChannelPool.java:455)
at io.grpc.PartialForwardingClientCallListener.onClose(PartialForwardingClientCallListener.java:39)
at io.grpc.ForwardingClientCallListener.onClose(ForwardingClientCallListener.java:23)
at io.grpc.ForwardingClientCallListener$SimpleForwardingClientCallListener.onClose(ForwardingClientCallListener.java:40)
at io.grpc.PartialForwardingClientCallListener.onClose(PartialForwardingClientCallListener.java:39)
at io.grpc.ForwardingClientCallListener.onClose(ForwardingClientCallListener.java:23)
at io.grpc.ForwardingClientCallListener$SimpleForwardingClientCallListener.onClose(ForwardingClientCallListener.java:40)
at com.google.cloud.spanner.spi.v1.SpannerErrorInterceptor$1$1.onClose(SpannerErrorInterceptor.java:100)
at io.grpc.internal.DelayedClientCall$DelayedListener$3.run(DelayedClientCall.java:463)
at io.grpc.internal.DelayedClientCall$DelayedListener.delayOrExecute(DelayedClientCall.java:427)
at io.grpc.internal.DelayedClientCall$DelayedListener.onClose(DelayedClientCall.java:460)
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$1StreamClosed.runInContext(ClientCallImpl.java:722)
at io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37)
at io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:133)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:750)

Caused by: io.grpc.StatusRuntimeException: NOT_FOUND: Instance not found: projects/java-docs-samples-testing/instances/spanner-testing-east1

resource_type: "type.googleapis.com/google.spanner.admin.instance.v1.Instance"

resource_name: "projects/java-docs-samples-testing/instances/spanner-testing-east1"

description: "Instance does not exist."
at io.grpc.Status.asRuntimeException(Status.java:535)
... 28 more