We are pleased to announce the general availability of IBM^® Semeru Runtime™ Certified Edition for z/OS^® 11.0.27.0 (2Q25 update for v11). This release contains significant contents along with the latest security update from OpenJDK 11.0.27+6 (Apr'25 CPU Update). The binaries have been made available on our standard distribution sites as on 04th Jun 2025. The 2Q25 update for IBM Semeru Runtimes Certified Edition for z/OS v17 (17.0.15.0) and v21 (21.0.7.0) are expected to be released early next week.

Key Contents in IBM Semeru Runtime Certified Edition for z/OS 11.0.27.0:

• This release supports the new IBM z17™ hardware. The JVM transparently uses 22 new IBM z17 hardware instructions to deliver better performance for your Java™ workloads. In addition, the OpenJCEPlus provider uses the z17 hardware to accelerate the Hash-based Message Authentication Code (HMAC) algorithm, improving message digest performance for Java workloads. Read more about unlocking IBM z17 Java Performance with IBM Semeru Runtime Certified Edition for z/OS here.
• This release also supports JDK Flight Recorder (JFR) on z/OS platform. JFR user guide blog and documentation can be found here. Read more about JFR, other additional features and fixes delivered as part of OpenJ9 VM in IBM Semeru Runtime Certified Edition for z/OS here. 
• The Java™ Batch Launcher and Toolkit for z/OS® (JZOS) has added a new section to SMF Record type 121 (Java runtime performance statistics) that includes information about JES job that launched the Java instance that a SMF 121 record belongs to in order to make analysis and troubleshooting easier.

• Refer to 'What's New' section in IBM Semeru Runtime Certified Edition for z/OS 11.0.27.0 for more detailed information.

Download Links:

• IBM Semeru Runtime Certified Edition for z/OS 11.0.27.0 is available on Java Information Manager (JIM) (IBM Only Access).
• Downloads of IBM Semeru Runtime Certified Edition for z/OS 11.0.27.0 is also available at EPWT site.
• The SMP/E installable format is available only through Shopz. Visit the Shopz website at Shopzseries.

Additional Information:

• Documentation for IBM Semeru Runtime Certified Edition for z/OS Version 11 is available here.
• Documentation for JDK Flight Recorder (JFR) can be found here.

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