IBM Support

IZE0823E and java.net.SocketException connecting to z/OS Explorer from Windows 7

Troubleshooting


Problem

You are using Windows 7 and the z/OS Explorer 2.1 to connect to z/OS and the connection fails with a "ConnectionException: java.net.SocketException: Connection reset" exception. You also receive message IZE0823E Error occurred getting data sets data_sets.

Symptom

IZE0823E Error occurred getting data sets data_sets

!ENTRY com.ibm.cics.eclipse.common 4 4 2013-06-26 10:32:58.803
!MESSAGE com.ibm.cics.core.comm.ConnectionException: java.net.SocketException: Connection reset
!STACK 0
com.ibm.cics.core.comm.ConnectionException: java.net.SocketException: Connection reset
at com.ibm.cics.zos.comm.ftp.ZOSFTPConnection.getFiles(ZOSFTPConnection.java:812)
at com.ibm.cics.zos.comm.ftp.ZOSFTPConnection.getJobs(ZOSFTPConnection.java:2068)
at com.ibm.cics.zos.model.ZOSConnectable.getJobs(ZOSConnectable.java:631)
at com.ibm.cics.zos.ui.views.JobRequestFilter.getChildren(JobRequestFilter.java:99)
at com.ibm.cics.zos.ui.views.TreeAsynchronousMediator$FetchingJob.runSub(TreeAsynchronousMediator.java:158)
at com.ibm.cics.eclipse.common.ui.JobWithCancelingSupport$1.run(JobWithCancelingSupport.java:56)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53)
Caused by: java.net.SocketException: Connection reset
at java.net.SocketInputStream.read(SocketInputStream.java:200)
at java.net.SocketInputStream.read(SocketInputStream.java:132)
at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:322)
at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:364)
at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:210)
at java.io.InputStreamReader.read(InputStreamReader.java:205)
at java.io.BufferedReader.fill(BufferedReader.java:165)
at java.io.BufferedReader.read(BufferedReader.java:186)
at org.apache.commons.net.io.CRLFLineReader.readLine(CRLFLineReader.java:58)
at org.apache.commons.net.ftp.FTP.__getReply(FTP.java:310)
at org.apache.commons.net.ftp.FTP.__getReply(FTP.java:290)
at org.apache.commons.net.ftp.FTP.sendCommand(FTP.java:479)
at org.apache.commons.net.ftp.FTP.sendCommand(FTP.java:552)
at org.apache.commons.net.ftp.FTP.sendCommand(FTP.java:601)
at org.apache.commons.net.ftp.FTP.pasv(FTP.java:952)
at org.apache.commons.net.ftp.FTPClient._openDataConnection_(FTPClient.java:755)
at org.apache.commons.net.ftp.FTPClient._openDataConnection_(FTPClient.java:657)
at org.apache.commons.net.ftp.FTPClient.initiateListParsing(FTPClient.java:3097)
at org.apache.commons.net.ftp.FTPClient.initiateListParsing(FTPClient.java:3072)
at com.ibm.cics.zos.comm.ftp.ZOSFTPConnection.getFiles(ZOSFTPConnection.java:802)
... 6 more

Cause

Windows 7 Firewall

Environment

-Djava.net.preferIPv4Stack=true property

Diagnosing The Problem



Resolving The Problem

Install IBM Explorer for z/OS 2.1.0 fix pack 1 (2.1.0.1) to resolve this problem.

Alternatively, the z/OS 2.1 Release Notes section on "Known issues and limitations" describes this symptom and provides the following other methods for resolution.



    If you are running CICS Explorer SDK on Windows 7, with Java™ 7, and the windows firewall enabled, the following error might occur:

    java.net.SocketException: Connection reset

    You can use one of the following methods to resolve the issue:
      • Use Java 6
      • Add a firewall exception for the Java binary
      • Add the following vm arg to your eclipse.ini file:
        -Djava.net.preferIPv4Stack=true

You should also install Windows 7 fix KB2754804 > http://support.microsoft.com/kb/2754804

Related Information

MS KB2754804

[{"Product":{"code":"SSGMGV","label":"CICS Transaction Server"},"Business Unit":{"code":"BU048","label":"IBM Software"},"Component":"Explorer","Platform":[{"code":"PF035","label":"z\/OS"}],"Version":"5.1","Edition":"","Line of Business":{"code":"LOB70","label":"Z TPS"}},{"Product":{"code":"SSBDYH","label":"IBM Explorer for z\/OS"},"Business Unit":{"code":"BU048","label":"IBM Software"},"Component":" ","Platform":[{"code":"PF033","label":"Windows"}],"Version":"2.1.0","Edition":"","Line of Business":{"code":"LOB70","label":"Z TPS"}}]

Product Synonym

z/OS Explorer CICS Explorer CICS TS CICSTS

Document Information

Modified date:
05 January 2026

UID

swg21642923

Page Feedback