2942052 - SUM error during IMPORT JLOAD step: Invalid Length

While upgrading your Java system with SUM the following error occurs during IMPORT JLOAD step:

com.sap.sdt.j2ee.tools.jload.JLoadProcessException: Errors while performing JLoad import.
See JLOADJLoadService.LOG and JLOAD_PHASEJLoadService.LOG for details

Checking JLOADJLoadService.LOG, you find the following error:

java.io.IOException: Invalid length. Length value cannot be less or equal to zero. Value that was read is 0
        at com.sap.inst.jload.io.GZIPInputSentinel.readLength(GZIPInputSentinel.java:68)
        at com.sap.inst.jload.io.GZIPInputSentinel.fillBuffer(GZIPInputSentinel.java:78)
        at com.sap.inst.jload.io.GZIPInputSentinel.read(GZIPInputSentinel.java:154)
        at java.util.zip.InflaterInputStream.fill(InflaterInputStream.java:240)
        at java.util.zip.InflaterInputStream.read(InflaterInputStream.java:158)
        at java.util.zip.GZIPInputStream.read(GZIPInputStream.java:117)
        at com.sap.inst.jload.io.ChoppedInputStream.read(ChoppedInputStream.java:123)
        at java.io.BufferedInputStream.fill(BufferedInputStream.java:246)
        at java.io.BufferedInputStream.read1(BufferedInputStream.java:286)
        at java.io.BufferedInputStream.read(BufferedInputStream.java:345)
        at java.io.DataInputStream.read(DataInputStream.java:100)
        at com.sap.inst.jload.db.BlobHandler.setValue(BitHandler.java:157)
        at com.sap.inst.jload.db.DBTable.load(DBTable.java:276)
        at com.sap.inst.jload.executor.JobExecutor.dbImport(JobExecutor.java:489)
        at com.sap.inst.jload.executor.JobExecutor.executeJob(JobExecutor.java:821)
        at com.sap.inst.jload.Jload.main(Jload.java:312)

SAP NetWeaver AS Java 7.x

JAVA_CD, JAVA_DVD, JAVA_INST , KBA , BC-UPG-TLS-TLJ , Upgrade tools for Java , Problem