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BigtableSession should check for null credentials

See original GitHub issue

I am using the Bigtable emulator for development, which doesn’t require authentication so is configured with CredentialType.None. The CredentialFactory returns null when asked for credentials of this type: https://github.com/GoogleCloudPlatform/cloud-bigtable-client/blob/master/bigtable-client-core-parent/bigtable-client-core/src/main/java/com/google/cloud/bigtable/config/CredentialFactory.java#L138

BigtableSession uses this factory and does not check for null credentials, resulting in null being passed into createNettyChannel: https://github.com/GoogleCloudPlatform/cloud-bigtable-client/blob/master/bigtable-client-core-parent/bigtable-client-core/src/main/java/com/google/cloud/bigtable/grpc/BigtableSession.java#L470

This leads to failure with a NullPointerException:

Exception in thread "main" java.lang.NullPointerException: interceptor
	at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:787)
	at io.grpc.ClientInterceptors$InterceptorChannel.<init>(ClientInterceptors.java:113)
	at io.grpc.ClientInterceptors$InterceptorChannel.<init>(ClientInterceptors.java:107)
	at io.grpc.ClientInterceptors.intercept(ClientInterceptors.java:102)
	at io.grpc.internal.ManagedChannelImpl.<init>(ManagedChannelImpl.java:406)
	at io.grpc.internal.AbstractManagedChannelImplBuilder.build(AbstractManagedChannelImplBuilder.java:295)
	at com.google.cloud.bigtable.grpc.BigtableSession.createNettyChannel(BigtableSession.java:494)
	at com.google.cloud.bigtable.grpc.BigtableSession$5.create(BigtableSession.java:462)
	at com.google.cloud.bigtable.grpc.io.ChannelPool.<init>(ChannelPool.java:246)
	at com.google.cloud.bigtable.grpc.BigtableSession.createChannelPool(BigtableSession.java:458)
	at com.google.cloud.bigtable.grpc.BigtableSession.createChannelPool(BigtableSession.java:439)
	at com.google.cloud.bigtable.grpc.BigtableClusterUtilities.<init>(BigtableClusterUtilities.java:152)
	at com.google.cloud.bigtable.grpc.BigtableClusterUtilities.forAllInstances(BigtableClusterUtilities.java:69)
	at com.google.cloud.bigtable.grpc.BigtableClusterUtilities.lookupInstanceId(BigtableClusterUtilities.java:82)
	at com.google.cloud.bigtable.grpc.BigtableSession.resolveLegacyOptions(BigtableSession.java:278)
	at com.google.cloud.bigtable.grpc.BigtableSession.<init>(BigtableSession.java:205)

Issue Analytics

State:
Created 6 years ago
Comments:9 (3 by maintainers)

Top GitHub Comments

1reaction

joshfgcommented, Aug 18, 2017

Hi @sduskis @mbrukman, That error happened when I was setting the BIGTABLE_EMULATOR_HOST env var. I believe it’s because of CredentialOptions.nullOption() being set here: https://github.com/GoogleCloudPlatform/cloud-bigtable-client/blob/bigtable-client-0.9.6.2/bigtable-client-core-parent/bigtable-client-core/src/main/java/com/google/cloud/bigtable/config/BigtableOptions.java#L238

This leads to a null credentials interceptor being set here: https://github.com/GoogleCloudPlatform/cloud-bigtable-client/blob/bigtable-client-0.9.6.2/bigtable-client-core-parent/bigtable-client-core/src/main/java/com/google/cloud/bigtable/grpc/BigtableSession.java#L454

…because of the null returned here: https://github.com/GoogleCloudPlatform/cloud-bigtable-client/blob/bigtable-client-0.9.6.2/bigtable-client-core-parent/bigtable-client-core/src/main/java/com/google/cloud/bigtable/grpc/io/CredentialInterceptorCache.java#L98

My workaround is to not set the BIGTABLE_EMULATOR_HOST env var, and instead configure the Bigtable options myself, setting a fake JSON credentials.

0reactions

sduskiscommented, May 15, 2018

We fixed this problem recently. This ought to be fixed once we release 1.4.0

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