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Mule Runtime 4.1.0 Release Notes

Jan 19, 2018

Mule 4.1 is the second Early Access Program release, not only incorporating feedback from the programโ€™s participants, but also adding lots of new features, performance improvements and bug fixes.

Mule Runtime 4.1.0 includes the following enhancements, changes, and fixes.

New Features and Enhancements

Core Runtime

  • Lots of performance improvements and enhancements of the new reactive engine

  • Enhancements in the Tooling API to better support Studio and Flow Designer

  • Dynamic evaluator component to support dynamic expressions

  • Library upgrades: now we use Log4j 2.10 and CXF 3.2.1

  • Transparent capacity overload handling on all message sources, even those released in 4.0

SDK

  • Support for defining custom capacity overload strategies.

  • Support for emitting notifications

  • Support for inbound/outbound correlation ids

  • Support for Cluster Aware message sources

  • Support for new automatic triggers like "On updated Salesforce Object" or "On new or updated file".

  • Improved support for Routers

  • Support for connectivity testing in SOAP connectors

  • Many bug fixes

This release is supported on Anypoint Private Cloud Edition 1.6.1 and later.

API Gateway Features and Enhancements

In this version, the focus is resilience, security, and troubleshooting ease.

  • Logs were enriched to enable an easier tracing of errors. In particular, in this release, a mechanism is implemented to allow for viewing the whole trip of a request as it goes through all applied policies to a resource, by specifying on the log4j configuration the package org.mule.runtime.core.internal.policy to trace level. Note: Trace level is not currently supported in CloudHub.

  • SSL verification for Runtime: API Platform communications is now enabled by default. This means that self-signed certificates, revoked or expired ones belonging to a connected proxy and/or Private Cloud system, will not be accepted. To disable this feature, specify anypoint.platform.enable_ssl_validation=false.

  • NTLM proxy is now supported, and the proxy basic authentication mechanism is fixed. Note: Deployed applications that need to go through a proxy must use another mechanism. This mechanism applies exclusively to the Runtime - API Platform communication.

  • Gatekeeper default mode is now โ€œFlexibleโ€, which is a tradeoff between blocking security and disaster recovery mitigation.

  • Introducing a new policy: Spike Control. This policy replaces the former Throttling policy. The policy will be used to smooth network traffic.

  • Developer experience improved when creating a custom policy: Clearer and more compact way to develop a custom policy than in v4.0.0.

  • This version includes support for Analytics processing through Anypoint Runtime Manager (which is an existing feature not enabled in v4.0.0). This allows for setting third-party systems such as Splunk to consume Analytics info.

Known Limitations and Workarounds

Issue Description

MULE-14571

Services are not being injected when using FakeMuleServer

MULE-14561

Expressions containing a opening bracket are not considered as a expression

MULE-14560

Not understandable exception is thrown when a transformation fails over a String with '%d'

MULE-14559

Socket leaked in CLOSE_WAIT after HTTP client dies

MULE-14557

When a Service/CoreExtension start fails, not started objects are tried to stop

MULE-14555

When hot deploying an invalid domain configuration, DeploymentService is answering corrupt MuleApplications

MULE-14553

TypeWrapper should not load class until needed

MULE-14550

@Export annotation does not work for enums

MULE-14535

Mule swallows HTTP exception

MULE-14532

Evaluate possible use of EmitterProcessor in processing strategy to simplify

MULE-14528

Log4JMDCAdaptor introduces significant contention

EE-5894

Scheduler unavailable when running batch job

Fixed Issues

Issue Description

MULE-14525

Scheduler unavailable error

MULE-14520

HTTP: CaseInsensitiveMultiMap loses case insensitiveness after making it immutable

MULE-14512

StackOverflow when compiling an extension with recursive structures

MULE-14511

Python and Ruby are shown as scripting languages

MULE-14508

Immutable transformations are chained in MultiMap

MULE-14493

Spring config module is exporting internal classes

MULE-14477

Nested flows/subflows not being initialized when executing tests on MUnit

MULE-14476

Add @NoImplement to ext-api interfaces

MULE-14474

Add the information about metadata category at the parameter model level

MULE-14473

When a thread pool is exhausted no error is logged

MULE-14470

Avoid pattern matching for every notification fired

MULE-14469

Implicit connection factory cannot find internal parameter group

MULE-14468

NPE When deserializing ArtifactDeclaration config without ref-name

MULE-14463

Fix ObjectStore schema generation

MULE-14437

Exported packages are not communicated when loading an extension with the AST Loader

MULE-14435

Policies: HTTP Requester status code validator doesn’t log processor location

MULE-14431

Transformers should use IO pool if they may read or write a stream

MULE-14430

When policies are applied they are shown as applications

MULE-14428

EmbeddedController does not handle spaces in paths

MULE-14427

Compilation should not fail for Scopes and Routers Object output

MULE-14424

Extension packager does not takes the user defined artifact json properly

MULE-14421

After domain full redeployment failure, all dependent applications are removed.

MULE-14408

MVEL error in chained calls where two or more objects of the chain possess the same method signature

MULE-14407

Not repeated names validations should apply to global elements only

MULE-14396

Reducing max concurrency with proactor processing strategy should not block cpu light threads.

MULE-14393

Notification exception kills a running mule app

MULE-14387

Extension documenter fails on document on elements that make usage of @Alias

MULE-14386

Soap Connect extensions not comunicating HTTP Stereotype in http config paraemter

MULE-14384

GroupCorrelation move to a new package broke backward

MULE-14381

Process empty files In File Connector should be optional

MULE-14375

FunctionalTestCase#getConfigFile should always support / slash

MULE-14361

For each executes first processor even that an execution failed

MULE-14359

When policy does not contain a try element, notifications are not sent in order

MULE-14357

ClassCastException in FileConnector restart

MULE-14356

Policy context is sharing SecurityManager with App’s

MULE-14345

Logging message or payload resolves to the same value

MULE-14336

Connectors are trying to stablish connection when mocking them on MUnit

MULE-14335

ObjectStore connector does not work properly with lazy init

MULE-14332

Serializable classes do not define serialVersionUID

MULE-14328

Invalid API defined on mule-metadata-model because of missing mule-module-maven-plugin

MULE-14320

MessageProcessor post-invoke notification missing when an error occurs

MULE-14310

Empty configuration name causes extension to fail

MULE-14309

Domain is not being disposed with its own classloader.

MULE-14308

@Parameter as operation attribute not working for routers

MULE-14305

Source errors do not contain app location info when logged

MULE-14303

Choice executes start before initialise when inside a router route

MULE-14302

SDK implemented functions fail to receive TypedValue wrapped elements.

MULE-14301

Scope/Routes error callback called twice

MULE-14298

Overriding _muleComponentInitialStateManager doesn’t work

MULE-14296

Double exception received to error handler when there is an Internal Server Error

MULE-14294

NPE when setting a payload, using on-error-continue in an operation policy

MULE-14287

MEL caching strategy is inconsistent when the variable accesor is set

MULE-14285

Post interceptors and notifications are not fired when an error occurs in a sub-flow referenced using a flow-ref.

MULE-14269

XML SchemaValidatorOperation equals

MULE-14268

XML Extensions do not properly set DataType on binded variables

MULE-14267

Parser sets rootContainerName for non Component children of prototype objects

MULE-14264

Fix HttpRequestProxyConfigTestCase

MULE-14263

Plugin bean factories are being loaded with the application classloader.

MULE-14262

Fix NPE in CXF module.

MULE-14259

Classloader issue when working with VM and application patch deployment

MULE-14204

Error count of flow statistics not tracked

MULE-14202

Tooling services doesn’t work if operation contains a List as parameter with reference support

MULE-14198

flow-ref is missing target attribute

MULE-14194

HTTP connector fails to close streaming content connection from HEAD request

MULE-14193

Wrong ArtifactType in SpringXmlConfigurationBuilder

MULE-14179

HTTP connector does not dispose listeners, causing a memory leak

MULE-14176

When melDefault property is set to true, dw: prefix in expressions is ignored

MULE-14174

Classcast Exception when CompositeProcessorChainRouter references SubFlow

MULE-14171

SDK loses the Map DataType generics

MULE-14168

Scatter-gather serialization error

MULE-14166

Smart connectors are not feeding datatype when using Java types to DW

MULE-14162

Variables added in the chain are missing the datatype for DW usage

MULE-14160

HTTP Connector does not route OAuth tokens request through proxy.

MULE-14159

NetSuite connector for Mule 4 does not work under Windows

MULE-14158

Error on HTTP path throws NP

MULE-14156

XML macro expansion fails to detect rootest element for some scenarios

MULE-14154

mule-module-maven-plugin crashes with some invalid .class files present in META-INF

MULE-14152

Poll Doesn’t wait for the execution to finish until it sends the next event

MULE-14145

TopLevel parameters not parsed when used as reference

MULE-14143

Scheduler logs in mule_ee.log when SchedulerMessageSource is stopped/started

MULE-14142

Parser error doesn’t point to the line with the error

MULE-14136

Optimize BindingContext creation

MULE-14134

For TopLevelObjectStore, DSLSyntax information doesn’t match the TypeDslAnnotation information

MULE-14131

No parser found for compatibility component if declared in domain

MULE-14122

Pointing to modules parent 1.1.0-SNAPSHOT still generates minMuleVersion 4.0.0

MULE-14116

SDK Sources doesn’t reconnect

MULE-14115

In Db Module, CLOB implementation is JDBC version dependent.

MULE-14112

Iterators are not converted into repeatable iterators when using StreamingUtils

MULE-14103

processingStrategy not applied to sub-flow

MULE-14093

Sources don’t support maps as parameters

MULE-14091

Connector’s documentation doesn’t document Type’s parameters descriptions

MULE-14078

Review graceful shutdown with <async/> scope

MULE-14075

Failure to resolve DataSense when using JMS with a JNDI connection factory

MULE-14071

Extensions archetype doesn’t handle special characters in extension name

MULE-14063

Exceptions thrown from an error handler are not processed

MULE-14062

Exclusive Optionals validations doesn’t consider Tooling Execution

MULE-14056

Log File being created even for muted apps

MULE-14055

Problem with using cache component

MULE-14054

It should be possible to enable http messages logging per app

MULE-14048

Don’t reuse cursors on reconnection

MULE-14035

Automatic retry on remote Closed exception does not respect RFC 7320

MULE-14029

ValueProviderService should not start the source when resolving values

MULE-14008

Soap Service NPE if the config is not configured properly.

MULE-14006

java.lang.OutOfMemoryError: Metaspace

MULE-14005

Core extensions disposed before flows finish

MULE-13995

ClassCastException logged when http request is finished after the http server is disposed

MULE-13994

Registry object is not accesible from DW script

MULE-13967

DataWeave Java written functions doesn’t work correctly with non-java types

MULE-13962

Different XML writer loaded depending on test execution order

MULE-13933

MVEL functions with object instantiations doesn’t work well in heavy load.

MULE-13741

Application itself showing up as application library on deployment

MULE-13732

GraphTransformerResolver is not handling correctly concurrency access

MULE-13248

Conflict between spring-module and any other plugin that contains spring

MULE-13070

Enrichers are applied in wrong order

MULE-12798

Allow parameter groups repeat Display Name

MULE-10724

custom-transformer attributes get mixed up

MULE-10304

Application redeployment fails to undeploy old application

MULE-4223

Fix Mule Runtime script start in Solaris 10

EE-5880

Crypto module exports internal classes

EE-5864

Regression on GW scenario between 4.0 and 4.1

EE-5860

Race condition in tests due to static polling node thread

EE-5858

FailOver not working with more than 2 nodes.

EE-5819

When executing a Dataweave transformation with a "set-variable" inside a sub-flow, the sub-flow creation fails

EE-5813

Race condition between event completion and async outbound endpoints in compatibility transports

EE-5794

Compatibility: File outbound endpoint is not writing content when used with HTTP polling inbound endpoint.

EE-5787

Compatibility JMS topic URIs are not compliant with spec

EE-5762

BitronixTransactionManager can’t be referenced from Spring beans.

EE-5737

Deploying apps with same GAV may FAIL using parallel deployment

EE-5700

Bitronix does not clean ActiveMQ ended transaction contexts in case of failure/recovery

EE-5637

OutOfMemoryError: Metaspace

EE-5853

Fix amc_setup.bat script to install agent in Windows

EE-5790

License validations fails twice when invalid

AGW-1909

Analytics violation is not populated when agent consumes the events

AGW-1908

Basic Auth and oAuth policies cannot be applied at the same time.

AGW-1885

Backoff - No INFO log on current step

AGW-1874

OAuth Interceptor IO Exceptions are not being back-offed

AGW-1855

Error applying internal policy when using parallel deployment

AGW-1785

When broken template jar is downloaded policy is never applied

AGW-1777

Proxy authentication for Platform Client not working

AGW-1744

Analytics through agent is not reducing queue size

AGW-1735

When there’s an error polling for Apis, log doesn’t show the response status code

AGW-1718

Change BadTokenResponse for OpenID

MULE-14510

Allows custom schedulers to use a runInCaller rejection policy

MULE-14478

Make ParameterGroupObjectBuilder#fieldsCache shared

MULE-14465

Make the SDK Validate extension’s exported packages

MULE-14410

mule extensions maven plugin must generate one extension model per run

MULE-14409

Introduce PollingSource

MULE-14389

Expose the DSL TypeCatalog using tooling client

MULE-14374

Update mave-revapi-extension to support mule-api-annotations

MULE-14326

Improve notifications serialization

MULE-14288

SDK sources need to be cluster aware

MULE-14272

[Model] Allow operations to not have a target

MULE-14189

Add the capability of attaching multiple icons in an extension

MULE-14183

Remove patching scenarios

MULE-14173

Add a splash information about the thread configurations calculated by Mule 4

MULE-14167

Listener threads should have the name of the app

MULE-14141

Support ConnectivityTesting on Domains

MULE-14137

Implement Partial fetching in Multilevel DataSense

MULE-14121

Provide embedded container API to deploy Domains

MULE-14108

If a temporary application resource couldn’t be deleted a warning message should be displayed

MULE-14042

Add the concept of class parameter to the extension model

MULE-14038

Support static custom types

MULE-13928

CorrelationId should be propagated from flow to other flows or systems via connector operations

MULE-13927

CorrelationId is not propagated from connector sources to Flow

MULE-13836

SDK Router to be void

MULE-13117

Support env vars as placeholders

MULE-12759

Compilation warnings should be logged with the corresponding level

MULE-11659

Add tool to ensure that Mule API is backward compatible on each release

MULE-11256

Create POLICY artifact type

MULE-10607

HttpListener: add method to find the status of the listener

MULE-10597

mule-extensions-maven-plugin shouldn’t require to run clean goal

MULE-10137

Allow AnnotationBasedDescriber to work with AST trees

MULE-10121

Provide a MessageBuilder API in scripting components to improve usability

MULE-14527

Optimize ProactorProcessingStrategy to avoid scheduling Transformers to IO if payload is small

MULE-14082

Add CRL feature to Mule 4 Runtime

EE-5878

Improve performance of http requester address ring

EE-5865

Add maxConcurrency attribute to batch job

EE-5816

Need to validate Hostname resolution and error reporting in Mule HTTP module

EE-5774

Support evaluation of dynamic DW scripts

EE-5578

It should be possible to define error-handler in a case by case basis without duplicating code.

EE-5790

License validations fails twice when invalid

EE-5765

Upgrade Tanuki wrapper script to the most recent version

AGW-1877

When a policy is applied, show on the logs its corresponding version.

AGW-1875

Platform Client operations which fail due to 401 should return UnauthorizedException

AGW-1824

Enable SSL Cert Validation by default for Platform Client.

AGW-1819

Change default level of Gatekeeper to flexible.

AGW-1778

Enable NTLM Proxy Authentication for Platform Client

AGW-1648

For on prem, Analytics on Mule 4 should add environment Name information to each event.

AGW-1457

When accumulating analytics events locally, it should be possible to place an upper limit on the database size.

AGW-1239

Authentication caches should have an expiration time

AGW-1198

Conciliate existing stored contracts at undeploy/redeploy

AGW-906

Add additional DEBUG or INFO logging to pointcut matching

Compatibility Testing Notes

Mule was tested on the following software:

Software Version

JDK

JDK 1.8.0 (Recommended JDK 1.8.0_151/52)

OS

MacOS 10.11.x, HP-UX 11i V3, AIX 7.2, Windows 2016 Server, Windows 10, Solaris 11.3, RHEL 7, Ubuntu Server 16.04

Application Servers

Tomcat 7, Tomcat 8, Weblogic 12c, Wildfly 8, Wildfly 9, Websphere 8, Jetty 8, Jetty 9

Databases

Oracle 11g, Oracle 12c, MySQL 5.5+, DB2 10, PostgreSQL 9, Derby 10, Microsoft SQL Server 2014

The unified Mule Runtime 4.1.0 and API Gateway is compatible with APIkit 1.1.0.

This version of Mule runtime is bundled with the Runtime Manager Agent plugin version 2.1.0.

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