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title: HL7 MLLP Connector Release Notes
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# HL7 MLLP Connector Release Notes

> For the full documentation index, see: https://docs.mulesoft.com/llms.txt

Support Category:
[Premium](https://www.salesforce.com/en-us/wp-content/uploads/sites/4/documents/legal/Agreements/versioning-back-support-policy.pdf)

The Mule HL7 MLLP connector provides connectivity and parsing functionality for MLLP messages.

Guide: [HL7 MLLP Connector Guide](https://docs.mulesoft.com/hl7-mllp-connector/latest/)  
Reference: [HL7 MLLP Connector Reference](https://docs.mulesoft.com/hl7-mllp-connector/latest/hl7-mllp-connector-reference)

## 2.2.4

**Aug 18, 2026**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.1.1 and later</p></td></tr><tr><td><p>OpenJDK</p></td><td><p>8, 11, and 17</p></td></tr></tbody></table>

### Fixed Issues

<table><colgroup><col> <col></colgroup><thead><tr><th>Issue Resolution</th><th>ID</th></tr></thead><tbody><tr><td><p>Fixed an intermittent issue with a broken pipe in the HL7 MLLP requester when using a connection pool with reconnection.</p></td><td><p>W-22903021</p></td></tr></tbody></table>

## 2.2.3

**July 26, 2026**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.1.1 and later</p></td></tr><tr><td><p>OpenJDK</p></td><td><p>8, 11, and 17</p></td></tr></tbody></table>

### Fixed Issues

<table><colgroup><col> <col></colgroup><thead><tr><th>Issue Resolution</th><th>ID</th></tr></thead><tbody><tr><td><p>An intermittent race condition in the HL7 MLLP listener no longer interferes with message reading.</p></td><td><p>W-23563951</p></td></tr></tbody></table>

## 2.2.2

**February 26, 2026**

### What’s New

- This connector is now FIPS 140-3 compliant.

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.1.1 and later</p></td></tr><tr><td><p>OpenJDK</p></td><td><p>8, 11, and 17</p></td></tr></tbody></table>

## 2.2.1

**August 28, 2025**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.1.1 and later</p></td></tr><tr><td><p>OpenJDK</p></td><td><p>8, 11, and 17</p></td></tr></tbody></table>

### Fixed Issues

<table><colgroup><col> <col></colgroup><thead><tr><th>Issue Resolution</th><th>ID</th></tr></thead><tbody><tr><td><p>The MLLP Listener now closes the connections when exceptions are thrown due to network-related issues.</p></td><td><p>W-18283925</p></td></tr></tbody></table>

## 2.2.0

**October 16, 2024**

### What’s New

- The connector now validates the TLS protocols that are configured to address security
  vulnerabilities and throws a security exception for protocols that aren’t supported. For more
  information, see the **Throws** section on the
  [HL7 MLLP Connector Reference](https://docs.mulesoft.com/hl7-mllp-connector/latest/hl7-mllp-connector-reference) page.

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.1.1 and later</p></td></tr><tr><td><p>OpenJDK</p></td><td><p>8, 11, and 17</p></td></tr></tbody></table>

### Fixed Issues

<table><colgroup><col> <col></colgroup><thead><tr><th>Issue Resolution</th><th>ID</th></tr></thead><tbody><tr><td><p>The MLLP Listener now responds as expected to requests and no longer hangs when the incoming payload isn’t consumed.</p></td><td><p>W-16822060</p></td></tr></tbody></table>

## 2.1.6

**January 24, 2024**

### What’s New

- This connector is now compatible with Java 17.

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.1.1 and later</p></td></tr><tr><td><p>OpenJDK</p></td><td><p>8, 11, and 17</p></td></tr></tbody></table>

## 2.1.5

**April 1, 2022**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.1.1 and later</p></td></tr></tbody></table>

### Fixed Issues

<table><colgroup><col> <col></colgroup><thead><tr><th>Issue</th><th>ID</th></tr></thead><tbody><tr><td><p>The <strong>Send</strong> operation now uses the standard (4 kb) chunk size.</p></td><td><p>W-10935871</p></td></tr></tbody></table>

## 2.1.4

**November 12, 2020**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.1.1 and later</p></td></tr></tbody></table>

### Features

Improved logs for debug and trace modes by adding more troubleshooting information at the byte level
for inbound and outbound messages and for the state of the MLLP Listener. (CONN-7220)

### Fixed Issues

Automatic restart is now enabled when the Listener throws errors. This fixes the issue that caused
the Listener to not accept new connections after throwing errors. (SE-17603)

## 2.1.3

**May 18, 2020**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.1.1 and later</p></td></tr></tbody></table>

### Fixed Issues

- Improved debug level logging to provide more detail. (SE-15711)

## 2.1.2

**December 12, 2019**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.1.1 and later</p></td></tr></tbody></table>

### Fixed Issues

- Fixed the reconnection strategy implementation for outbound connections (SE-13271)

- Changed to transmitting data as bytes to avoid any issues with character encoding (SE-13928)

## 2.1.1

**November 13, 2019**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.1.1 and later</p></td></tr></tbody></table>

### Fixed Issues

TLS handling is fixed so that client authentication is optional and only used if a truststore is
supplied. (SE-12545).

## 2.1.0

**February 11, 2019**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.1.1 and later</p></td></tr></tbody></table>

### Features

Source configuration allows specifying a connection count, and limiting the number of simultaneous
connections to the supplied value. If not configured, the default behavior is to allow any number of
simultaneous connections.

### Fixed Issues

Closing a connection to the source caused an empty message to be sent through the flow, generally
resulting in an exception.

## 2.0.4

**January 11, 2019**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.1.1 and later</p></td></tr></tbody></table>

### Features

The start-of-block character is now configurable.

### Fixed Issues

- The end-of-block character was incorrectly marked as required. It is now optional.

- Under certain scenarios, all messages received after the first one would fail, with the error
  message `Message does not start with 'MSH'`. This was fixed.

## 2.0.3

**November 16, 2018**

This update fixes an response issue, and adds the new **sendAndReceive** operation.

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.1.1 and later</p></td></tr></tbody></table>

### Fixed Issues

Mule 4 HL7 MLLP Connector does not wait for a response after sending a message out. Added new
operation sendAndReceive.

## 2.0.2

**October 1, 2018**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.1.1 and later</p></td></tr></tbody></table>

### Fixed Issues

Depending on the way messages were sent to the connector, it would stop receiving requests after the
first one. This was fixed.

## 2.0.1

**September 20, 2018**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.1.1 and later</p></td></tr></tbody></table>

### Fixed Issues

ACK like messages weren’t flowing back to sender.

## 2.0.0

**June 18, 2018**

### Compatibility

<table><colgroup><col> <col></colgroup><thead><tr><th>Software</th><th>Version</th></tr></thead><tbody><tr><td><p>Mule</p></td><td><p>4.1.1 and later</p></td></tr></tbody></table>

### Features

- Receive Message - The HL7 MLLP connector provides the functionality to receive MLLP messages.

- Send Message - The HL7 MLLP connector provides the functionality to send MLLP messages.

## See Also

- [Salesforce Help](https://help.salesforce.com)

- [MuleSoft Services](https://www.mulesoft.com/support-and-services)

- [Known Issues](https://help.salesforce.com/s/issues)