IJ57789: ON Z/OS AND JZOS, THIRD-PARTY APPLICATIONS MAY PRODUCE GARBLED CHARACTERS IN LOGS AND CONSOLE OUTPUT.

APAR status

• Closed as program error.

Error description

• Error Message: None
  .
  Stack Trace:
  Applications exhibiting this symptom typically show stack traces
  that invoke ConsolePrintStream.write(..) APIs, where the data
  being written is encoded using the default (nonEBCDIC) charset.
  
  
  For example, the following stack trace from a Jenkins agent
  illustrates the issue:
  
  com.ibm.jvm.io.ConsolePrintStream.write
  (ConsolePrintStream.java:177)
  hudson.remoting.StandardOutputStream.write
  (StandardOutputStream.java:90)
  hudson.remoting.BinarySafeStream$2._write
  (BinarySafeStream.java:290)
  hudson.remoting.BinarySafeStream$2.write
  (BinarySafeStream.java:274)
  
  The resulting garbled output written to stdout or stderr may
  then be consumed by a parent process. This can lead to a hang or
  other incorrect behavior, often accompanied by stack traces that
  invoke ConsoleInputStream.read*() APIs.
  
  For example, the following stack trace from a Jenkins agent
  shows the corresponding read-side impact:
  
  java.io.FileInputStream.readBytes(byte[], int, int) (Native
  Method)
  java.io.FileInputStream.read(byte[], int, int)
  (FileInputStream.java:300)
  java.io.BufferedInputStream.fill (BufferedInputStream.java:291)
  java.io.BufferedInputStream.read1 (BufferedInputStream.java:347)
  
  java.io.BufferedInputStream.implRead
  (BufferedInputStream.java:420)
  java.io.BufferedInputStream.read (BufferedInputStream.java:399)
  com.ibm.jvm.io.ConsoleInputStream.read
  (ConsoleInputStream.java:275)
  .
  

Local fix

Problem summary

• Applications such as Jenkins, Log4j, and Gradle that invoke
  System.out.write() or System.err.write() using the default
  charset may produce garbled characters in logs and console
  output. For Jenkins, we also observe a hang occurring when the
  Jenkins agent is running on a z/OS node.
  

Problem conclusion

• This issue is resolved by reinstating the character conversion
  logic, eliminating the garbled output.
  .
  This APAR will be fixed in the following Releases:
  .
  IBM Semeru Runtimes
    21              21.0.10.1
    25              25.0.3.0
  .
  Downloads and supplementary documentation can be found at the
  following locations:
  - For non z/OS operating systems:
   - IBM Semeru Runtimes, Version 11 and later
     https://www.ibm.com/semeru-runtimes/downloads/
   - IBM SDK, Java Technology Edition, Version 8
     https://www.ibm.com/support/pages/java-sdk-downloads/
  - For the z/OS operating system:
   - Java SDK Products on z/OS
     https://www.ibm.com/support/pages/java-sdk-products-zos
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  OPENJDK CLASS L

• Fixed component ID

  621800100

Applicable component levels