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Mule Runtime 4.2.1 Release Notes

Initial release: July 22, 2019

Mule Runtime 4.2.1 includes enhancements, fixes, and patch releases.

New Features and Enhancements

DataWeave:

  • maxAttributeSize: Property to set the maximum attribute size in the XML parser.

  • escapeCR: Property for escaping a carriage return (CR) in the XML writer.

Changes

Not applicable.

Upgrade Requirements

Not applicable.

July 2022

Patch release version: 4.2.1-20220622

This patch update addresses the following issues:

Description Issue

Spring upgraded from 5.1.6 to 5.3.21.

W-10989650

DataWeave 2.2.1 is bundled with the Mule 4.2.1 release. The July patch release addresses the following DataWeave issues:

Description Issue

This release fixes Avro property handling.

W-11324418

For guidance with the patching process, see Apply Patch Updates.

March 2021

Patch release version: 4.2.1-20210222

For guidance with the patching process, see Apply Patch Updates.

The March update addresses the following issues:

Issue Description

SE-19557/MULE-19218

Resolved an issue that prevented opening a new cursor on a closed stream.

SE-18310/MULE-17747/MULE-19187

Fixed a DefaultEventContext memory leak error that occurred when a source failed to send an error response.

SE-19397

Resolved an issue in the January release that caused batch job executions to freeze.

EE-7680

Updated the Runtime Manager agent to version 2.4.15.

February 2021

Patch release version: 4.2.1-20210118

For guidance with the patching process, see Apply Patch Updates.

The February update addresses the following issues:

Issue Description

MULE-18675/SE-16997

Fixed an issue where using dynamic configurations for paged or streaming operations, caused a disconnection error when trying to consume the pages or the stream.

MULE-19129/SE-19069

Resolved a problem in which the CloudHub scheduler interrupted intermittently.

MULE-19068/SE-18382

Fixed an issue that caused intermittent Cannot open a new cursor on a closed stream errors.

SE-12654

DataWeave: Allowed streaming in Excel format.

DW-371/MULE-19140

DataWeave: Fixed an issue with property handling.

SE-12393

DataWeave: Improved the performance of data format lookup and the include property to avoid verbose error messages.

SE-13423

DataWeave: Fixed issue where FlatFile could not write dw keys as values.

SE-14421

DataWeave: Fixed issue to avoid file leaks on indexed files.

SE-14631

DataWeave: Fixed issue where NPE and selecting same part content of different types multiple times returns the same content as the multipart.

January 2021

Patch release version: 4.2.1-20201130

For guidance with the patching process, see Apply Patch Updates.

The January update addresses the following issues:

Issue Description

SE-11610

Fixed an issue in which global properties took precedence over the use of deployment properties. This issue occurred when a custom configuration properties provider was used.

EE-7443, SE-16276

Fixed an issue in running batch jobs that caused the jobs to get stuck and never finish.

SE-13052

Fixed a DataWeave failure to read (transform) several consecutive escaped backslashes in CSV.

SE-12627

Fixed camel-case DataWeave writer properties, which must be handled in lowercase.

SE-12733

Resolved an issue with importing a Mule connector module from another module that was not working in DataWeave.

SE-12518

Fixed DataWeave writer properties that were not working in the Logger component.

SE-17773

Added a new system property com.mulesoft.dw.valueSelector.selectsAlwaysFirst to avoid caching selected indexes in DataWeave.

MULE-19015

Fixed a Cannot open a new cursor on a closed stream error that occurred when using a nested foreach with a batch size larger than 1.

November 2020

Patch release version: 4.2.1-20201020

For guidance with the patching process, see Apply Patch Updates.

The November update addresses the following issues:

Issue Description

SE-13782/MULE-17469

Resolved an issue with high memory consumption caused by excessive references to the org.mule.runtime.config.internal.model.ApplicationModel class.

SE-16853/MULE-18889

Resolved an execution problem that occurred when an application used Groovy with Scripting module version 2.0.0.

SE-17773

Added a new system property com.mulesoft.dw.valueSelector.selectsAlwaysFirst to avoid caching selected indexes in DataWeave.

SE-17445/MULE-18885

Fixed an issue in which the queue manager leaked queue configuration instances when using Anypoint Connector for Virtual Machine (VM Connector) in cluster deployment setups.

SE-13715/MULE-18812

Fixed an issue that occurred after Mule runtime engine restarted, which caused Mule application deployment failures while parsing domain shared resources.

October 2020

Patch release version: 4.2.1-20200921

For guidance with the patching process, see Apply Patch Updates.

The October update addresses the following issues:

Issue Description

MULE-18573/SE-15592

Fixed an issue that occurred when an app transformed data using variables.

MULE-18657/SE-14959

Fixed a problem that prevented primary node initialization in Anypoint Connector for Salesforce (Salesforce Connector).

MULE-18164/SE-14610

Fixed an error that occurred when deploying the Async scope in a custom policy.

SE-15624

Fixed an issue in which the FTP redelivery policy didn’t work in the debugger.

MULE-18047/MULE-18634

Cursor troubleshooting now includes the component that generated a cursor provider.

MULE-16897

Resolved an issue that occurred with cluster primary-node listener activity after agent initialization.

September 2020

Patch release version: 4.2.1-20200824

For guidance with the patching process, see Apply Patch Updates.

The September update addresses the following issues:

Issue Description

SE-16867

Fixed an issue with DataWeave that caused the following error:

You called the function 'AnonymousFunction' with these arguments

MULE-18628/SE-16435

Resolved a problem in which applications were unable to retrieve objects from the cache due to serialization issues.

MULE-18584/SE-16130

Fixed a memory leak caused by unclosed cursors when used with Foreach loops.

SE-16455

Resolved a memory leak that could cause OutOfMemory errors, which occurred when the payload was not explicitly nullified at the end of the Foreach loop.

MULE-18579/SE-16764

Resolved an issue in which when an object store expired, it loaded all deserialized entries into memory, doubling memory consumption.

MULE-18604/SE-12900

Fixed an issue in which NTLM authentication-dancing failed when performing multiple parallel requests requiring renegotiation.

MULE-18390

Fixed an OutOfMemoryError: Metaspace issue that occurred when running MUnit tests.

August 2020

Patch release version: 4.2.1-20200727

For guidance with the patching process, see Apply Patch Updates.

The August update addresses the following issues:

Issue Description

MULE-17096

Fixed a NullPointerException error that occurred when using a lazy initialization subflow with an Async scope.

MULE-16987, SE-12167

Resolved a problem in which MUnit did not execute mocking for a custom REST connector with defined attributes.

SE-12193

Fixed a problem in which a Mule application containing APIkit for SOAP and an Async scope did not start when launched from Runtime Manager.

SE-12434

Fixed an issue in which an application could not be undeployed on Windows if the anchor file (%MULE_HOME%\apps_app-name_-anchor.txt) was deleted.

SE-12743

Resolved a problem in which a Cache scope failed validation when the payload was empty when entering the scope.

MULE-17863, SE-13533

Resolved an issue in which MUnit tests did not run reliably in a Windows environment when started from the command line or Jenkins due to improper file cleanup.

MULE-17862, SE-13617

Resolved a problem when using Mule 4 on Windows in which MUnit tests failed postexecution, with the IOException: Unable to delete file error.

SE-13647

Fixed a java.lang.IllegalStateException: Can’t create new contexts after factory is closed error that occurred when running MUnit test cases.

MULE-18569, SE-16282

Resolved an issue in which the Anypoint Connector for Kafka returned the java.nio.file.InvalidPathException: Illegal char <:> exception when accessing filesystem configuration files.

MULE-17341

Fixed a problem in which a referenced subflow was not resumed after stopping and starting an application.

EE-6857

Fixed a file leak when retrieving the DataWeave transformation script from a file.

EE-7072

Resolved an issue in which MUnit failed to test an application using batch processing with the Can’t create new contexts after factory is closed error.

AGW-3409

Fixed an issue that occurred when processing analytics events after policy disposal.

July 2020

Patch release version: 4.2.1-20200709

For guidance with the patching process, see Apply Patch Updates.

The July update addresses the following issues:

Issue Description

MULE-18506, SE-16470

Reverted MULE-18370 because it caused a key collision in the ManagedCursorProvider cache management.

SE-13383

Fixed an issue that occurred while moving corrupted domain object store files to the Garbage folder.

SE-14114

Fixed an issue in which the DataWeave stream failed to serialize.

SE-15067

DataWeave now properly handles the #[ sequence inside a String value in Mule operations, such as Logger.

SE-15834

Fixed DataWeave inferred types when the output is undefined storage so that the output is recalculated.

SE-16095

Fixed an OutOfMemoryError: Metaspace error on applications with multiple concurrent deployments and some redeployments.

June 2020

Patch release version: 4.2.1-20200518

For guidance with the patching process, see Apply Patch Updates.

This patch release consolidates fixes to Mule 4.2.1 since the initial release on July 22, 2019. The fixes extend through June 2020.

Issue Description

SE-15592

Fixed an incorrect value when accessing variables' content in complex transformations with loops.

SE-13691

Fixed issues in which the Scheduler incorrectly ran twice or didn’t honor the configured cron or fixed-frequency setting on restart.

SE-15659

Fixed an issue that generated HTTP request timeouts in several connectors, including Salesforce Connector and Microsoft Dynamics Connector, which cause disruption in their operation.

SE-15540

Fixed an issue that, under high concurrency, might cause a leak in HTTP requests due to a race condition scenario.

SE-13371

Fixed an issue in the Salesforce connector where it did not automatically refresh the OAuth token, causing expired token errors interrupting execution of transactions with Salesforce.

SE-13634

Fixed an issue that affected the Web Service Consumer, causing long WSDL parsing times with multiple levels of nested imports.

SE-14946

Fixed the error Failed to read geo directoryjava.nio.file.NoSuchFileException that appeared after deploying an application.

SE-13547

Fixed an issue in which an HTTP Request using NTLM authentication did not send the request payload resulting in a timeout request operation.

SE-13660

Fixed an issue that caused FlowStack : <empty> log messages with invalid expressions.

SE-13547

Fixed an issue in which an HTTP Request using NTLM authentication did not send the request payload resulting in a timeout request operation.

SE-13300

Fixed an issue in which batch records didn’t process when the Persistent queues option was enabled.

AGW-3949

Reduced log levels for API Gateway recoverable errors.

MULE-17706

Added support for HTTP header injection in Anypoint Connector for HTTP.

MULE-17812

Fixed an issue in which the refresh dance did not execute after the access token expired.

MULE-17812

Fixed an issue in which the refresh dance did not execute after the access token expired.

SE-14595

Fixed an issue in which Mule apps did not process more than one message from Anypoint MQ.

SE-13786

Fixed an issue where the API gateway was using the Business Group organization ID instead of the Master organization ID for OAuth provider operations.

SE-13951

Fixed a DataWeave OOM error Direct buffer memory in 0.1 worker.

SE-13832

Fixed an issue that caused a MULE:FLOW_BACK_PRESSURE error in 4.2.x.

SE-13440

Fixed an Out of Memory issue in Batch Aggregator.

SE-13196

Fixed an issue where the configuration property output not correct when the prefix was escaped.

MULE-16513

Flow backpressure check is now performed before source policies are applied.

SE-13613

Fixed a backward-compatibility issue with TLS support.

SE-13383

Fixed an issue that occurred while moving corrupted domain object store files to the Garbage folder.

SE-13677

Fixed an issue in which Mule request was not being processed intermittently, even though the request was received by the Listener.

SE-12836

Fixed an issue with the splitBy function failing with the error Caused by: java.io.IOException: Stream is closed when running without debugging mode.

SE-13213

Fixed error HTTP Packet header is too large.

SE-13099

Added the port where HTTP listens to logs.

SE-11990

Fixed an issue where the ListenerConfig attribute of <oauth2-provider:config> was not working when referencing domain project listener.

SE-9292

Fixed an issue with filenames in UTF-8 where the £ character in a multipar/form-data was transformed to £ in ASCII.

SE-13580

Fixed an issue that caused a NullPointerException error with patch SE-12807-4.2.1-1.0 applied.

SE-13184

Fixed an issue where Try Scope with On Error Continue stops and does not continue processing.

SE-13196

Fixed an issue with configuration property values that include special characters

SE-13611

Fixed an issue that caused Mule runtime engine to throw exception java.lang.NoSuchMethodError: org.mule.runtime.extension.api.runtime.config.ConfigurationStats.getRunningSources().

SE-13612

Fixed an issue where a CloudHub patch release caused an error: java.lang.NoSuchMethodError: org.mule.runtime.core.internal.util.rx.ConditionalExecutorServiceDecorator.<init>(Lorg/mule/runtime/api/scheduler/Scheduler;Ljava/util/function/Predicate;)V

SE-11204

Fixed an issue where the HTTP request did not renegotiate NTLM authentication when new credentials were provided.

EE-6968

Fixed a leak in the first classloader that invokes an HTTP service in the Mule app.

SE-13091

Fixed an issue where the JWT policy was not responding under load when the CPU_INTENSIVE operation was present in the application.

SE-13095

Inbound metrics did not appear for some apps.

SE-13004

Fixed an issue where the CloudHub worker was unresponsive and unable to start on its own.

SE-12896

Fixed an issue with excessive logging filling /tmp and partition 100%.

SE-13388

Fixed 100% CPU usage issue due to HTS service.

SE-13118

Fixed inconsistent property loading.

SE-12626

SFTP connector was not reconnecting after JSchException error.

SE-11329

SFTP with public key authentication fails after 5 minutes.

SE-11198

SFTP listener with identity file and start delay set as 0 fails to retrieve file.

SE-12832

Inbound Metrics are missing for app in Anypoint Monitoring.

SE-11994

High CPU - When using VM listener with persistent queue even when the app is idle.

SE-12772

Try scope with transactions forces all components to execute on CPU_LITE threads.

SE-12807

Cannot open a new cursor on a closed stream inside a for-each scope.

SE-12279

SFTP connection pool is exhausted when file path does not exist.

SE-10506

Out of Memory in Metaspace when redeploying application.

SE-12204

Spring dependency collision between runtime and connectors.

SE-12583

Flow Backpressure error when running DataWeave transformation.

SE-12495

Extensions configuration being leaked over time.

SE-12028

OAuth Module for HTTP Requester is leaking threads.

SE-12397

Unlabelled endpoint is shown within the Monitoring dashboard.

SE-12451

Fixed issue when using the Batch component and streams that caused a java.lang.IllegalStateException.

Initial 4.2.1 Release

Release date: July 22, 2019

The initial release of Mule 4.2.1 includes known limitations and fixes.

Known Limitations and Workarounds

Issue Description

MULE-17020

When debugging an application, Studio is unable to stop over connectors made with the XML SDK and REST Connect connectors.

MULE-17018

Configurations with an expression that contains XML-encoded characters are not allowed. For example, host="['baseUri.com']" is considered invalid. As a workaround, configure the attribute with non-encoded characters, such as host="#['baseUri.com']".

MULE-17079

JWT policy performance issues are under load.

AGW-3299

When the Mule OAuth provider is configured to be used by the Mule OAuth token enforcement policy, and organization or environment credentials are not correctly configured, the deployment of the provider fails with a MuleRuntimeException.

AGW-3506

Analytics is generating events for only one API.

Fixed Issues

Issue Description

MULE-17061

Optimization to avoid thread switch in PS is broken

MULE-17051

Default Error Handler should be looked up after initialization

MULE-17050

SDK Non Blocking operation and policy is not returning a response under load

MULE-17007

@OutputJsonType does not set metadata type id

MULE-16995

Shared runtime deps in app mess up classloading

MULE-16991

Race condition when invalidating cached connections

MULE-16986

XA Transactions fail to rollback on ConnectionException

MULE-16983

Reconnection should not retry when resource has joined active transaction

MULE-16982

ArrayOutOfBoundException when creating custom scheduler

MULE-16967

Database bulk parameters missing on artifact declaration generated from mule-config

MULE-16964

TryScope with no tx fails within subFlow+async

MULE-16952

Publisher returned by applyWithChildContext not completed when source is completed

MULE-16936

Mule 4 JMS Bridge (ActiveMQ) scenario stops working after a certain time

MULE-16899

ClassCast exception when registry lookup finds no match

MULE-16897

No primary node notification listener set on extension sources with cluster support

MULE-16896

Bound connections not released on TransactionException

MULE-16894

IllegalStateException in Polling Source when cluste node is shutting down

MULE-16892

Error handler being executed twice when flow ref is involved

MULE-16891

flowTrace OoM when using foreach with large collections

MULE-16878

StringToEnum Transformer should have different names for each extensionModel

MULE-16872

Async in a transaction executes in the same thread as the transaction

MULE-16856

Starting a flow should fail when a task is rejected from scheduler.

MULE-16853

ConfigurationProperties does not honor properties hierarchy when having prop resolved with placeholder

MULE-16847

MessageProcessors.processWithChildContext must complete the EventContext

MULE-16841

Password mask regex does not consider dw and non-literal expressions.

MULE-16836

Cannot find snapshot artifact via resource loader when trying to scaffold an API

MULE-16831

Fix XA transactions with bitronix

MULE-16830

Global Properties are taking precedence over Application Properties

MULE-16824

LazyInit should initialize the Mule configuration at part of the component initializations phase

MULE-16790

Global ErrorHandler does not resolve transaction

MULE-16784

MuleClassLoaderLookupPolicy wrongly assumming javax.xml.bind.attachment as system package in Java 11

MULE-16775

OnErrorPropagate in global error handler is not rollbacking tx

MULE-16758

Multithreaded sources are concurrently reconnected more than once

MULE-16753

A transaction is not available error related to execution on a cpuLight thread

MULE-16744

spring.schemas exported from runtime conflict with spring dependencies used in an app

MULE-16730

Interception API: Validation all throws NullPointerException

MULE-16725

Fix race condition in flow lifecycle handling

MULE-16657

Metaspace leak when generating dynamic configurations

MULE-15599

Serializing an artifact model constructed from serializing a JSON loses data

MULE-16833

Optimize resolution of payload and attributes default parameters

MULE-16808

Update Apache Ant to at least 1.9.12 in 3.x

MULE-16713

Support application/java payloads in redelivery-policy

EE-6804

Bitronix Proxy hides connectivity exceptions

EE-6797

Bitronix exception when redeploying an app using XA transactions

EE-6796

Dirty Bitronix transaction log

EE-6780

Corrupt patches not applied but logged as applied

EE-6779

BitronixTransactionManager built before QueueManager initialize causes NPE

EE-6774

Memory leak on com.mulesoft.mule.runtime.bti.internal.xa.QueueManagerXaResourceProducer

EE-6769

Possible race condition when registering ConnectionFactory in Bitronix

EE-6710

Batch RecordFilteringStrategy is not filtering correctly

EE-6773

Leak of QueueSessionResourceHolder’s: Add troubleshooting information

EE-6736

Update hazelcast to at least 3.12.x in 4.x

EE-6704

Add System Property to set some bitronix logs to debug

EE-6374

Sending large bodies causes OOM error in HTTP requester

AGW-3213

Fix UriBuilder causing class not found

AGW-3181

Log indicating client id or secret are not provided is never shown

AGW-3142

Upgrading policy version is not using new policy jar

SE-12023

Custom policy is not removing its resources as expected

SE-11918

Autodiscovery blocking Gatekeeper from unlocking the API

SE-11887

Using cxf-bundle-minimal or rs-api-2.0.jar in mule application fails the API pairing on CloudHub

SE-11482

Spinoff from SE-10969, JdbcMapStore Object Store in Mule 4.1.5 runtime Cluster environment causes ClassCastException and prevents on-prem Mule Application from pairing with API Manager

SE-11239

AuthenticationServer is leaking objects

DataWeave

  • Fix (SE-12061): Allow line comments in the last line.

  • Add support for Enums and Field constants on Java Bridge.

  • Fix: leftJoin should support lambdas that return something that is coercible to a String.

  • Fix: Optional should be supported for None and Some and on Java Bridge.

  • Add a property to set the maximum attribute size in the XML parser.

  • Add a property for escaping a carriage return (CR) in the XML writer.

  • Fix: Bug in indexed XML reader parsing root elements with only text.

MULE-17060

Use the default ProcessingStrategy for policies instead of a custom one

MULE-16990

Improve troubleshooting logging for XA transaction

MULE-16937

SDK should no longer that at least one Content parameter to be primary

MULE-16909

Support custom parameters in OAuth Dance

MULE-16908

Support Client Credentials gran type in the SDK

MULE-16881

Migrate app deployment file to 4.1

MULE-16851

Implement CompositeConverter#toString to aid in transformers troubleshooting

MULE-16755

ObjectStore expire: account for inconsistencies that may occur in cluster

MULE-16437

Improve ExtensionClient performance

EE-6760

Make Bitronix XA connection pool configurable

This version of Mule runtime is bundled with the Runtime Manager Agent plugin version 2.3.0.