topic Re: NoClassDefFoundError: org/apache/poi/xssf/usermodel/XSSFWorkbook in Talend Studio

NoClassDefFoundError: org/apache/poi/xssf/usermodel/XSSFWorkbook

RLai — Sat, 16 Nov 2024 03:27:58 GMT

Hi all,

I have a job using the exchange components tFileExcelWorkbookOpen and tFileExcelSheetInput, however I am running into the following error when the job reaches these components:

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/poi/xssf/usermodel/XSSFWorkbook
	at vendor_etl.bps_stageload_0_11.BPS_stageLoad.tFileList_1Process(BPS_stageLoad.java:989)
	at vendor_etl.bps_stageload_0_11.BPS_stageLoad.runJobInTOS(BPS_stageLoad.java:2028)
	at vendor_etl.bps_stageload_0_11.BPS_stageLoad.main(BPS_stageLoad.java:1668)
Caused by: java.lang.ClassNotFoundException: org.apache.poi.xssf.usermodel.XSSFWorkbook
	at java.net.URLClassLoader.findClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	... 3 more
[statistics] disconnected

I have the jar files installed in their respective directories in Talend\7.2.1\studio\configuration\.m2\repository\org\talend\libraries and the studio is recognizing the jar files.

Is there a solution to this?

Re: NoClassDefFoundError: org/apache/poi/xssf/usermodel/XSSFWorkbook

nivedhitha — Fri, 24 Jan 2020 22:20:32 GMT

@RLai ,

To include these JARs in the build, you can simply try dragging an excel component(that comes with talend) at the beginning of your job and just deactivate it.

This way the jars become available and the job should run fine

Re: NoClassDefFoundError: org/apache/poi/xssf/usermodel/XSSFWorkbook

RLai — Mon, 27 Jan 2020 15:27:58 GMT

@nivedhitha,

I tried creating a new test job with a deactivated standard talend excel component, but I am still running into the same error. When I have both the standard and custom components enabled, I get the following error:

Exception in thread "main" java.lang.IncompatibleClassChangeError: Found class org.apache.poi.util.POILogger, but interface was expected
	at org.apache.poi.openxml4j.opc.PackageRelationshipCollection.parseRelationshipsPart(PackageRelationshipCollection.java:303)
	at org.apache.poi.openxml4j.opc.PackageRelationshipCollection.<init>(PackageRelationshipCollection.java:163)
	at org.apache.poi.openxml4j.opc.PackageRelationshipCollection.<init>(PackageRelationshipCollection.java:133)
	at org.apache.poi.openxml4j.opc.PackagePart.loadRelationships(PackagePart.java:570)
	at org.apache.poi.openxml4j.opc.OPCPackage.getParts(OPCPackage.java:728)
	at org.apache.poi.openxml4j.opc.OPCPackage.open(OPCPackage.java:237)
	at org.apache.poi.openxml4j.opc.OPCPackage.open(OPCPackage.java:166)
	at org.apache.poi.ooxml.POIXMLDocument.openPackage(POIXMLDocument.java:89)
	at org.apache.poi.xssf.usermodel.XSSFWorkbook.<init>(XSSFWorkbook.java:336)
	at vendor_etl.excel_testing_0_1.excel_testing.tFileList_1Process(excel_testing.java:1891)
	at vendor_etl.excel_testing_0_1.excel_testing.tPrejob_1Process(excel_testing.java:1332)
	at vendor_etl.excel_testing_0_1.excel_testing.runJobInTOS(excel_testing.java:2772)
	at vendor_etl.excel_testing_0_1.excel_testing.main(excel_testing.java:2583)

The subjob using the standard Talend excel component does not fail when the subjob using the custom excel components are disabled

Custom excel components disabled.PNG

Re: NoClassDefFoundError: org/apache/poi/xssf/usermodel/XSSFWorkbook

RLai — Tue, 28 Jan 2020 21:34:02 GMT

For anyone following, this was most likely caused by different versions of some the jar files.. I found 3.15 and 3.17 versions of the poi, poi-ooxml and poi-ooxml-schemas jars. Rather than look for all jar files with different versions, I backed up / deleted my .m2 and plugins folders and asked a coworker who has not experienced this issue to copy those folders for me to replace since we have worked on the same projects. I can now run jobs using the exchange excel components.