Uploading a decision table into BRMS generates "Unexpected packet" exception

Issue

When uploading a decision table to a particular package, we're seeing the following error from Oracle database:

Caused by: java.io.IOException: Retrieving database resource 
       at org.apache.jackrabbit.core.data.db.DbInputStream.openStream(DbInputStream.java:70)
       at org.apache.jackrabbit.core.data.db.DbInputStream.read(DbInputStream.java:110)
       at java.io.BufferedInputStream.read1(BufferedInputStream.java:256)
       at java.io.BufferedInputStream.read(BufferedInputStream.java:317)
       at java.io.FilterInputStream.read(FilterInputStream.java:90)
       at jxl.read.biff.File.<init>(File.java:91)
       at jxl.Workbook.getWorkbook(Workbook.java:268)
       at jxl.Workbook.getWorkbook(Workbook.java:253)
       at org.drools.decisiontable.parser.xls.ExcelParser.parseFile(ExcelParser.java:74)
       ... 59 more
Caused by: org.apache.jackrabbit.core.data.DataStoreException: Retrieving database resource 
       at org.apache.jackrabbit.core.data.db.DbDataStore.convert(DbDataStore.java:717)
       at org.apache.jackrabbit.core.data.db.DbDataStore.openStream(DbDataStore.java:560)
       at org.apache.jackrabbit.core.data.db.DbInputStream.openStream(DbInputStream.java:68)
       ... 67 more
Caused by: java.io.IOException: IO Error: Unexpected packet
       at oracle.jdbc.driver.OracleBlobInputStream.needBytes(OracleBlobInputStream.java:204)
       at oracle.jdbc.driver.OracleBufferedStream.readInternal(OracleBufferedStream.java:174)
       at oracle.jdbc.driver.OracleBufferedStream.read(OracleBufferedStream.java:143)
       at oracle.jdbc.driver.OracleBufferedStream.read(OracleBufferedStream.java:132)
       at org.apache.commons.io.IOUtils.copyLarge(IOUtils.java:1025)
       at org.apache.commons.io.IOUtils.copy(IOUtils.java:999)
       at org.apache.jackrabbit.core.data.db.TempFileInputStream.writeToFileAndClose(TempFileInputStream.java:52)
       at org.apache.jackrabbit.core.data.db.DbDataStore.moveToTempFile(DbDataStore.java:424)
       at org.apache.jackrabbit.core.data.db.DbDataStore.openStream(DbDataStore.java:550)
       ... 68 more
Caused by: java.sql.SQLException: IO Error: Unexpected packet
       at oracle.jdbc.driver.T4CConnection.getBytes(T4CConnection.java:2356)
       at oracle.sql.BLOB.getBytes(BLOB.java:331)
       at oracle.jdbc.driver.OracleBlobInputStream.needBytes(OracleBlobInputStream.java:181)