Release Notes for IDR 11.4 for Event Server

December 19, 2025

IDR 11.4.0.5-5789

Enhancements in IDR 11.4.0.5-5789 for CDC Replication Engine for Event Server

• Updated JVM to 17.0.17.0, java version "17.0.17" 2025-10-21 IBM Semeru Runtime Certified Edition 17.0.17.0 (build 17.0.17+10). For details, see IBM Semeru Runtimes fixes for version 17 enhancement luw-base
• Updated various open source libraries. Installer size increased.

Bugs fixed in IDR 11.4.0.5-5789 for CDC Replication Engine for Event Server

• External Secret Store fields are missing from the Windows configuration tool dmconfigurets

November 28, 2025

IDR 11.4.0.5-5788

Enhancements in IDR 11.4.0.5-5788 for CDC Replication Engine for Event Server

• Dmshowversion command output now includes Java version

Known Issues fixed in IDR 11.4.0.5-5788 for CDC Replication Engine for Event Server

• DT456860 CDC Replication Engine targets - refresh performance can be lower when using multiple image builder threads

October 30, 2025

IDR 11.4.0.5-5785

Known Issues fixed in IDR 11.4.0.5-5785 for CDC Replication Engine for Event Server

• DT448348 CDC Replication Engines do not set JVM parameter -Xms after saving configuration

Bugs fixed in IDR 11.4.0.5-5785 for CDC Replication Engine for Event Server

• com.datamirror.ts.assertion.NecessityException with encoding not supported error reported after upgrading CDC.
• MsgReaddTableshandler.readdPublishedTable() can block metadata access when getting the latest column definitions
• External table load while mirror call to dmmarkexternalunloadend fails with "Attempt to mark end of external unload without marking start of external unload for table"
• Message to get the DB columns for a table holds metadata lock too long so it locks out other threads

September 30, 2025

IDR 11.4.0.5-5783

Enhancements in IDR 11.4.0.5-5783 for CDC Replication Engine for Event Server

• CDC is now supported in OpenShift Virtualization clusters, with configuration guidance available in the Knowledge Center.
• Updated JVM to 17.0.16.0, java version "17.0.16" 2025-07-15 IBM Semeru Runtime Certified Edition 17.0.16.0 (build 17.0.16+8). For details, see IBM Semeru Runtimes fixes for version 17
• Implement a global %REPLACE functionality that would replace all matching characters in all columns of all tables.
• IDR now supports External Parallel Table Load (Refresh) while mirroring.

Known Issues fixed in IDR 11.4.0.5-5783 for CDC Replication Engine for Event Server

• DT450444 Differential Refresh deletes all remaining rows in the target table if the subscription is stopped immediate or abort

September 1, 2025

IDR 11.4.0.5-5776

Enhancements in IDR 11.4.0.5-5776 for CDC Replication Engine for Event Server

• System property target_allow_parallel_jdbc_refresh has been added to enable JDBC refresh of a table to be performed by multiple apply threads.

APARs fixed in IDR 11.4.0.5-5776 for CDC Replication Engine for Event Server

• DT447888 INVALID TABLE NAME EXCEPTION WHEN RUNNING DMREMOVECLOSEDTXN UTILITY IF PERSISTED PRIVATE PARSER TXN QUEUES EXIST AND THE CORRESPONDING SUBSCRIPTION NAME IS NOT EXACTLY 12 CHARACTERS IN LENGTH.

Known Issues fixed in IDR 11.4.0.5-5776 for CDC Replication Engine for Event Server

• DT447888 INVALID TABLE NAME EXCEPTION WHEN RUNNING DMREMOVECLOSEDTXN UTILITY IF PERSISTED PRIVATE PARSER TXN QUEUES EXIST AND THE CORRESPONDING SUBSCRIPTION NAME IS NOT EXACTLY 12 CHARACTERS IN LENGTH.

August 1, 2025

IDR 11.4.0.5-5770

Enhancements in IDR 11.4.0.5-5770 for CDC Replication Engine for Event Server

• IDR now supports cipher suites TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 and TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 with TLS 1.2.
• IDR now supports Ubuntu 22.04 LTS and 24.04 LTS
• The system properties queue_blocking_call_before_flushing_timeout and target_optimizer_wait_timeout_millis can now be changed without requiring the subscription to be stopped before the changes take effect
• The system properties queue_blocking_call_before_flushing_timeout and target_optimizer_wait_timeout_millis can now be set on a per-subscription basis

Bugs fixed in IDR 11.4.0.5-5770 for CDC Replication Engine for Event Server

• Fixed the issue that caused %TOCHAR expression to fail with "newValue is out of valid range" error while using decimal parameters after upgrade

June 27, 2025

IDR 11.4.0.5-5768

Enhancements in IDR 11.4.0.5-5768 for CDC Replication Engine for Event Server

• Batching is now allowed when using a NetEffectConvertUpdates fast apply algorithm for Adaptive Apply mappings or during the Refresh While Active (RWA) period. This substantially improves performance in these situations.
• Insert batching via a single multi-row insert statement is now supported when JDBC insert batching does not deliver signficant performance gains.
• Adaptive Apply (AA) is now only performed during refresh if table truncate is disabled or the user has explicitly specified they want AA during refresh by setting a system property. This substantially improves refresh performance for AA mappings by allowing Fastload refresh and JDBC batching during JDBC refresh

Known Issues fixed in IDR 11.4.0.5-5768 for CDC Replication Engine for Event Server

• DT442954 CDC Replication Engines - subscriptions intermittently fail to start with "startup timeout has occurred. Replication will end" event

June 4, 2025

IDR 11.4.0.5-5765

Enhancements in IDR 11.4.0.5-5765 for CDC Replication Engine for Event Server

• Updated JVM to 17.0.15.0, java version "17.0.15" 2025-04-15 IBM Semeru Runtime Certified Edition 17.0.15.0 (build 17.0.15+6). For details, see IBM Semeru Runtimes fixes for version 17

Known Issues fixed in IDR 11.4.0.5-5765 for CDC Replication Engine for Event Server

• DT438085 CDC Replication Engines - Event notification with SMTP fails with javax.mail.AuthenticationFailedException after secret store changes. The fix is available in 11.4.0.5-5752 and newer.

Bugs fixed in IDR 11.4.0.5-5765 for CDC Replication Engine for Event Server

• Non inline LOBs in a JDBC batch are not closed

April 4, 2025

IDR 11.4.0.5-5757

Enhancements in IDR 11.4.0.5-5757 for CDC Replication Engine for Event Server

• Updated JVM to 17.0.14.0, java version "17.0.14" 2025-01-21 IBM Semeru Runtime Certified Edition 17.0.14.0 (build 17.0.14+7). For details, see IBM Semeru Runtimes fixes for version 17

February 28, 2025

IDR 11.4.0.5-5752

Enhancements in IDR 11.4.0.5-5752 for CDC Replication Engine for Event Server

• Updated JVM to 17.0.13.0, java version "17.0.13" 2024-10-15 IBM Semeru Runtime Certified Edition 17.0.13.0 (build 17.0.13+11). How to take a backup, recompile Java user exits, KCOPs and external secret store classes are described in CDC Replication Engines migrate from Java 8 to Java 17, along with troubleshooting tips.
• Effective July 2025, IDR CDC will no longer provide support for following operating system versions: RedHat Enterprise Linux (RHEL) 7; CentOS 7.x. This extends support from January 2025 through July 2025

December 20, 2024

IDR 11.4.0.5-5742

Enhancements in IDR 11.4.0.5-5742 for CDC Replication Engine for Event Server

• Updated JVM to 8.0.8.35, java version "1.8.0_431" Java(TM) SE Runtime Environment (build 8.0.8.35 - pap6480sr8fp35-20241105_01(SR8 FP35)). For details, see Java SDK fixes, version 8.0. Recompile Java user exits, KCOPs and external secret store classes.

Known Issues fixed in IDR 11.4.0.5-5742 for CDC Replication Engine for Event Server

• DT419421 CDC Replication Engines - command line utilities might not properly negotiate TLS settings with the local engine

December 9, 2024

IDR 11.4.0.5-5740

Enhancements in IDR 11.4.0.5-5740 for CDC Replication Engine for Event Server

• Provide ability to trim trailing whitespace characters from source character-type columns when being applied to varchar columns

Known Issues fixed in IDR 11.4.0.5-5740 for CDC Replication Engine for Event Server

• DT416679 CDC Replication Engines - Subscription does not stop if data channel and/or control channel connection is implicitly closed due to error
• DT418775 CDC Replication Engines - Following upgrade, engines using an External Secret Store User Exit may fail to start, reporting invalid user/password to customer database. Affects upgrades to 11.4.0.5-5735 or older.

October 2, 2024

IDR 11.4.0.5-5733

Enhancements in IDR 11.4.0.5-5733 for CDC Replication Engine for Event Server

• Updated JVM to 8.0.8.30, java version "1.8.0_421" Java(TM) SE Runtime Environment (build 8.0.8.30 - pwa6480sr8fp30-20240801_01(SR8 FP30))
• %REPLACE derived expression can now replace codepoints above 127

Known Issues fixed in IDR 11.4.0.5-5733 for CDC Replication Engine for Event Server

• DT395890 CDC Replication Engines - an instance being used as a source datastore can stop due to NullPointerException in singlescrape
• DT396565 CDC Replication Engines - Target engine Fast Apply does not retry if it encounters a SQL exception such as a commit failing

Bugs fixed in IDR 11.4.0.5-5733 for CDC Replication Engine for Event Server

• dmshowversion, dmconfigurets unable to run if you select "IBM Data Replication IMS for z/OS Remote Source" offering during installation

September 10, 2024

IDR 11.4.0.5-5731

Enhancements in IDR 11.4.0.5-5731 for CDC Replication Engine for Event Server

• Users can now specify subscriptions that are not allowed to use the shared scrape staging store by setting system property mirror_subs_allowed_to_use_staging_store to false at the subscription level

Known Issues fixed in IDR 11.4.0.5-5731 for CDC Replication Engine for Event Server

• DT394553 CDC Replication Engines - subscription ends on error NullPointerException when a commit fails on the target engine
• DT393813 CDC Replication Engines - Differential Refresh includes CDR columns in update and delete where clauses leading to rows not being found

September 10, 2024

IDR 11.4.0.5-5730

Enhancements in IDR 11.4.0.5-5730 for CDC Replication Engine for Event Server

• CDC Replication Engines now issue a warning if source and target columns have incompatible datatypes during table assignment for non-explicitly mapped columns
• System property mirror_timezone_support_enabled added to force CDC Replication Engines to use the source timezone when converting JCF and commit timestamps

June 27, 2024

IDR 11.4.0.5-5726

Enhancements in IDR 11.4.0.5-5726 for CDC Replication Engine for Event Server

• Effective January 2025, IDR CDC will no longer provide support for following operating system versions: RedHat Enterprise Linux (RHEL) 7; CentOS 7.x

June 4, 2024

IDR 11.4.0.5-5725

Enhancements in IDR 11.4.0.5-5725 for CDC Replication Engine for Event Server

• IIDR now provides the option of retrying the fast apply failed Unit of Work
• Updated JVM to 8.0.8.25, java version "1.8.0_411" Java(TM) SE Runtime Environment (build 8.0.8.25 - pwa6480sr8fp25-20240328_01(SR8 FP25))

Known Issues fixed in IDR 11.4.0.5-5725 for CDC Replication Engine for Event Server

• DT382379 CDC Replication Engines - dmsupportinfo command does not collect complete details expected.

May 23, 2024

IDR 11.4.0.5-5722

Known Issues fixed in IDR 11.4.0.5-5722 for CDC Replication Engine for Event Server

• DT258648 CDC Replication Engines - Replication ends on error "ClassNotFoundException" for Timestamp12Format class when executing a user exit that uses Timestamp12 class

May 1, 2024

IDR 11.4.0.5-5721

Enhancements in IDR 11.4.0.5-5721 for CDC Replication Engine for Event Server

• CDC now supports custom character sets that map multiple byte sequences to the same Unicode character.

March 28, 2024

IDR 11.4.0.5-5715

Enhancements in IDR 11.4.0.5-5715 for CDC Replication Engine for Event Server

• Document userexit interfaces such as UserExitIF, DataRecordIF and ReplicationEventIF in docs folder

March 1, 2024

IDR 11.4.0.5-5706

Enhancements in IDR 11.4.0.5-5706 for CDC Replication Engine for Event Server

• Updated JVM to 8.0.8.20, java version "1.8.0_401" (build 8.0.8.20 - pwa6480sr8fp20-20240112_01(SR8 FP20))
• Increased the requested maximum number of pending connections on the TCP accept queue

January 25, 2024

IDR 11.4.0.5-5703

Enhancements in IDR 11.4.0.5-5703 for CDC Replication Engine for Event Server

• Effective February 2024, IDR CDC will no longer provide support for following operating system versions: SuSE 11.0; Ubuntu 16.04; Oracle Linux 6.x; CentOS 6.x; AIX 7.1; Microsoft Windows 7, 8, 8.1, Server 2008, Server 2008R2

Bugs fixed in IDR 11.4.0.5-5703 for CDC Replication Engine for Event Server

• When a key column update is converted to a delete/insert, we unnecessarily use Adaptive Apply as the RWA conflict resolution method for the delete and insert

December 22, 2023

IDR 11.4.0.5-5702

Enhancements in IDR 11.4.0.5-5702 for CDC Replication Engine for Event Server

• CDC Replication Engine for Event Server is now available in 11.4.0.5