How To Troubleshoot the OPA Spring Boot SDK
Enabling Logging
The OPA Spring Boot SDK uses Spring's built in logging facilities. To get the most verbose logging from the OPA Spring Boot SDK, add the following to your application.properties file:
logging.level.com.styra.opa.springboot=TRACE
Is there something you'd like to see the OPA Spring Boot SDK include in its logs? Feel free to open an issue on the issue tracker.
OPA Connectivity Issues
If the dependent OPA Java SDK is not able to connect to an OPA you may see exceptions similar to the ones below:
java.net.ConnectException
at java.net.http/jdk.internal.net.http.HttpClientImpl.send(HttpClientImpl.java:573)
at java.net.http/jdk.internal.net.http.HttpClientFacade.send(HttpClientFacade.java:123)
at com.styra.opa.openapi.utils.SpeakeasyHTTPClient.send(SpeakeasyHTTPClient.java:20)
at com.styra.opa.openapi.OpaApiClient.executePolicyWithInput(OpaApiClient.java:508)
at com.styra.opa.openapi.models.operations.ExecutePolicyWithInputRequestBuilder.call(ExecutePolicyWithInputRequestBuilder.java:37)
at com.styra.opa.OPAClient.executePolicy(OPAClient.java:536)
at com.styra.opa.OPAClient.evaluateMachinery(OPAClient.java:683)
at com.styra.opa.OPAClient.evaluate(OPAClient.java:354)
at com.styra.opa.springboot.OPAAuthorizationManager.opaRequest(OPAAuthorizationManager.java:254)
at com.styra.opa.springboot.OPAAuthorizationManager.check(OPAAuthorizationManager.java:275)
...
com.styra.opa.OPAException: executing policy at 'Optional[demo/main]' with failed due to exception 'java.net.ConnectException'
at com.styra.opa.OPAClient.executePolicy(OPAClient.java:547) ~[opa-1.4.1.jar:na]
at com.styra.opa.OPAClient.evaluateMachinery(OPAClient.java:683) ~[opa-1.4.1.jar:na]
at com.styra.opa.OPAClient.evaluate(OPAClient.java:354) ~[opa-1.4.1.jar:na]
at com.styra.opa.springboot.OPAAuthorizationManager.opaRequest(OPAAuthorizationManager.java:254) ~[springboot-0.0.4-plain.jar:na]
at com.styra.opa.springboot.OPAAuthorizationManager.check(OPAAuthorizationManager.java:275) ~[springboot-0.0.4-plain.jar:na]
at com.styra.opa.springboot.OPAAuthorizationManager.check(OPAAuthorizationManager.java:33) ~[springboot-0.0.4-plain.jar:na]
at org.springframework.security.web.access.intercept.RequestMatcherDelegatingAuthorizationManager.check(RequestMatcherDelegatingAuthorizationManager.java:87) ~[spring-security-web-6.3.1.jar:6.3.1]
...
If you encounter these types of errors, this typically indicates that the SDK was not able to reach OPA. This can have several causes:
- OPA is running, but the OPA URL the SDK is using is not correct. See Configuring
OPAAuthorizationManagerfor more information about how to configure the OPA URL. - OPA is not running. You may have forgotten to start it, or it may have failed to start due to a bad configuration, syntax errors in your policy, etc.
- OPA is running and the OPA URL is configured correctly, but a network problem is preventing the SDK from communicating with OPA.
Malformed Policy Outputs
If your OPA policy does not correctly follow the output schema described here, the SDK will not be able to interpret the policy decisions. This may result in errors similar to the ones below:
java.lang.IllegalArgumentException: Cannot construct instance of `com.styra.opa.springboot.OPAResponse` (although at least one Creator exists): no boolean/Boolean-argument constructor/factory method to deserialize from boolean value (false)
at [Source: UNKNOWN; byte offset: #UNKNOWN]
at com.fasterxml.jackson.databind.ObjectMapper._convert(ObjectMapper.java:4624) ~[jackson-databind-2.17.0.jar:2.17.0]
at com.fasterxml.jackson.databind.ObjectMapper.convertValue(ObjectMapper.java:4565) ~[jackson-databind-2.17.0.jar:2.17.0]
at com.styra.opa.OPAClient.evaluateMachinery(OPAClient.java:686) ~[opa-1.4.1.jar:na]
at com.styra.opa.OPAClient.evaluate(OPAClient.java:354) ~[opa-1.4.1.jar:na]
at com.styra.opa.springboot.OPAAuthorizationManager.opaRequest(OPAAuthorizationManager.java:254) ~[springboot-0.0.4-plain.jar:na]
at com.styra.opa.springboot.OPAAuthorizationManager.check(OPAAuthorizationManager.java:275) ~[springboot-0.0.4-plain.jar:na]
at com.styra.opa.springboot.OPAAuthorizationManager.check(OPAAuthorizationManager.java:33) ~[springboot-0.0.4-plain.jar:na]
at org.springframework.security.web.access.intercept.RequestMatcherDelegatingAuthorizationManager.check(RequestMatcherDelegatingAuthorizationManager.java:87) ~[spring-security-web-6.3.1.jar:6.3.1]
...
In the above sample, the SDK was configured to access a rule which evaluated to a boolean value. Don't be fooled by no boolean/Boolean-argument constructor/factory, this isn't a Jackson serialization issue, but instead a failure to deserialize a boolean into an OPAResponse.
java.lang.IllegalArgumentException: Unrecognized field "acmecorp" (class com.styra.opa.springboot.OPAResponse), not marked as ignorable (2 known properties: "decision", "context"])
at [Source: UNKNOWN; byte offset: #UNKNOWN] (through reference chain: com.styra.opa.springboot.OPAResponse["acmecorp"])
at com.fasterxml.jackson.databind.ObjectMapper._convert(ObjectMapper.java:4624) ~[jackson-databind-2.17.0.jar:2.17.0]
at com.fasterxml.jackson.databind.ObjectMapper.convertValue(ObjectMapper.java:4565) ~[jackson-databind-2.17.0.jar:2.17.0]
at com.styra.opa.OPAClient.evaluateMachinery(OPAClient.java:686) ~[opa-1.4.1.jar:na]
at com.styra.opa.OPAClient.evaluate(OPAClient.java:354) ~[opa-1.4.1.jar:na]
at com.styra.opa.springboot.OPAAuthorizationManager.opaRequest(OPAAuthorizationManager.java:254) ~[springboot-0.0.4-plain.jar:na]
...
In the above sample, the SDK was configured to access a rule which returned a JSON object, but with incorrect fields. In this case, acmecorp isn't a field that is expected when deserializing an OPAResponse.
If you see these types of errors, then you should closely look at the output your policy is sending to the SDK. Your decision logs are a good place to start looking.
An easy way to have OPA dump human-readable decision logs to the console is to add the --log-format=text --log-level=error --set decision_logs.console=true arguments to your opa run -s command.