X509FederationClient httpClient resource leak

[mbalamaruthu]

We're using InstancePrincipalsAuthenticationDetailsProvider as part of our canary test run with MicronautTest. Since the test is run periodically, we've observed a resource leak, where live threads increase for each canary run.

The resource leak seems to be com.oracle.bmc.auth.internal.X509FederationClient leaving a leaked httpClient. This may need to be closed at something similar to preDestroy in Micronaut or make X509FederationClient closeable. Thanks.

The client causing resource leak snippet is as below.

this.httpClient = HttpProvider.getDefault() .newBuilder() .baseUri(URI.create(federationEndpoint)) .property(StandardClientProperties.ASYNC_POOL_SIZE, 1) .registerRequestInterceptor( Priorities.AUTHENTICATION, new AuthnClientFilter( new RequestSignerImpl( keySupplier, SigningStrategy.STANDARD, keyIdSupplier), Collections.emptyMap())) .registerRequestInterceptor( Priorities.HEADER_DECORATOR, new ClientIdFilter()) .registerRequestInterceptor(Priorities.USER, new LogHeadersFilter()) .build(); this.circuitBreaker = CircuitBreakerHelper.makeCircuitBreaker(this.httpClient, circuitBreakerConfig);