ErrLookup › Netflix/Hystrix
Netflix/Hystrix
Hystrix is a latency and fault tolerance library designed to isolate points of access to remote systems, services and 3rd party libraries, stop cascading failure and enable resilience in complex distributed systems where failure is inevitable. · Java · 248 source files
Analyzed at 5ce3bc58c3 on 2026-08-14. 62 documented errors.
| Code / Message | Type | Severity | Tags |
|---|---|---|---|
| Failed to set Thread Pool properties. | exception | error | hystrix, javanica, configuration, thread-pool, annotation |
| return type of ' ' method should be ; | validation | error | hystrix, javanica, closure, reflection, type-mismatch |
| Incompatible return types. \nCommand method: " +… | exception | error | hystrix, javanica, fallback, generics, type-mismatch, validation |
| Not implemented anymore. Will be implemented in a new… | exception | error | hystrix, serialization, deprecated-api, unsupportedoperation, migration, runtime |
| Not an event that can be converted to… | exception | error | java, hystrix, metrics, thread-pool, enum-conversion |
| fallback cannot return Future if the fallback isn't command… | exception | error | hystrix, javanica, fallback, async, future, validation |
| Failed trying to wrap constructor of class: " + className | exception | critical | hystrix, network-auditor, javaagent, javassist, instrumentation, constructor |
| Failed trying to wrap class: " + className | exception | critical | hystrix, network-auditor, javaagent, javassist, jdk-compatibility, instrumentation |
| 'https://github.com/Netflix/Hystrix/issues/1458' - no valid… | validation | error | hystrix, javanica, aop, aspectj, proxy, issue-1458 |
| Failed to set Command properties. | exception | error | hystrix, javanica, configuration, command-properties, annotation |
| Return type of batch method must be java.util.List… | validation | error | hystrix, javanica, collapser, generics, return-type |
| bad property value. property name | validation | error | hystrix, javanica, configuration, enum, validation |
| fallback method wasn't found: " + name + "(" +… | exception | error | hystrix, javanica, fallback, reflection, method-resolution |
| Another strategy was already registered. | exception | error | java, hystrix, plugins, global-state, initialization-order |
| " + getLogMessagePrefix() + " command executed multiple… | exception | error | java, hystrix, state-machine, reuse, api-misuse |
| Command should implement | exception | error | hystrix, javanica, execution-type, observable, internal |
| Response has already terminated so response can not be set | exception | error | java, hystrix, collapser, rxjava, lifecycle |
| Rejected command because thread-pool queueSize is at… | exception | warning | hystrix, thread-pool, rejection, backpressure |
| fallback cannot return 'void' if command return type is " +… | exception | error | hystrix, javanica, fallback, completable, rxjava, validation |
| Percentile ( ) is not currently cached | exception | error | java, hystrix, metrics, percentiles, hdrhistogram |
| unknown property | validation | error | hystrix, javanica, configuration, properties, validation |
| AsyncResult is just a stub and cannot be used as complete… | exception | warning | hystrix, javanica, async-result, future, misuse |
| Failed trying to wrap method [" + method.getName() + "] of… | exception | error | java, javaagent, bytecode, javassist, network-auditor |
| Could not initialize intrinsics | exception | critical | hystrix, jvm-internals, security-manager, unsafe |
| batch method is absent | validation | error | hystrix, javanica, collapser, batch-method, misuse |
| Command should implement | exception | error | hystrix, javanica, execution-type, observable, internal |
| Unsupported type | exception | error | hystrix, javanica, generics, reflection, collapser |
| method cannot be annotated with HystrixCommand and… | validation | error | hystrix, javanica, annotation, aop, misuse |
| Request caching is not available. Maybe you need to… | exception | error | java, hystrix, request-context, caching, thread-local |
| unsupported execution type | exception | error | hystrix, javanica, execution-type, version-conflict, internal |
| required batch method for collapser is absent, wrong… | validation | error | hystrix, javanica, collapser, generics, batch-method |
| batch method must be annotated with HystrixCommand… | validation | error | hystrix, javanica, collapser, annotation, misuse |
| return type of cacheKey method must be String. Method | validation | error | hystrix, javanica, cache, cache-key, return-type |
| wrong 'weavingMode' property, supported: " +… | exception | error | hystrix, javanica, aspectj, weaving, system-property, configuration |
| Response has already terminated so exception can not be set | exception | error | java, hystrix, collapser, exception-handling, lifecycle |
| bad property value. property name | validation | error | hystrix, javanica, configuration, number-parsing, validation |
| You have set the bucket size to 0ms. Please set a positive… | exception | error | java, hystrix, configuration, metrics, circuit-breaker |
| method with name ' ' doesn't exist in class | validation | error | hystrix, javanica, cache, cache-key, reflection |
| Incompatible return types. \nCommand method: " +… | exception | error | hystrix, javanica, fallback, return-type, validation |
| unsupported rx type | exception | error | hystrix, javanica, rxjava, rxjava2, observable, type-mismatch |
| No fallback available. | exception | error | java, hystrix, fallback, resilience |
| The timeInMilliseconds must divide equally into… | exception | error | hystrix, metrics, configuration, validation |
| implementation is not an instance of | exception | error | hystrix, configuration, reflection, classcast |
| HystrixRequestContext.initializeContext() must be called at… | exception | error | hystrix, request-context, threadlocal, servlet-filter |
| Collapser method must have one argument | validation | error | hystrix, javanica, collapser, signature, misuse |
| It's prohibited to create instances of the class. | exception | warning | hystrix, javanica, utility-class, instantiation, static |
| Couldn't invoke ThreadManager.currentRequestThreadFactory | exception | error | hystrix, appengine, reflection, environment |
| Sub type at nesting level | validation | error | hystrix, javanica, collapser, generics, raw-type |
| Not an event that can be converted to… | exception | error | java, hystrix, metrics, collapser, enum-conversion |
| Trying to start null batch which means it was shutdown… | exception | error | java, hystrix, collapser, race-condition, shutdown |
| Not an event that can be converted to HystrixEventType | exception | error | java, hystrix, metrics, enum-conversion, internal |
| Failed executing wrapped Action0 | exception | error | hystrix, rxjava, exception-wrapping, debugging |
| HystrixCollapser failed while executing. | exception | error | java, hystrix, collapser, exception-wrapping |
| HystrixNetworkAuditorEventListener can not be NULL | exception | error | hystrix, network-auditor, javaagent, null-check, listener |
| Interrupted while waiting for thread-pools to terminate… | exception | warning | java, hystrix, shutdown, thread-pool, interruption |
| HystrixCommandGroup can not be NULL | exception | error | java, hystrix, configuration, constructor-validation |
| implementation class not found | exception | error | hystrix, configuration, classpath, reflection |
| fallback cannot return Future if command isn't asynchronous. | exception | error | hystrix, javanica, fallback, async, future, validation |
| implementation not able to be instantiated | exception | error | hystrix, configuration, reflection, constructor |
| fallback cannot return Observable if command isn't… | exception | error | hystrix, javanica, fallback, observable, rxjava, validation |
| Hystrix does not support delayed scheduling | exception | error | hystrix, rxjava, scheduler, unsupported-operation |
| implementation not able to be accessed | exception | error | hystrix, configuration, reflection, access-modifiers |