KB-1285 Excel Tools throws "java.lang.NoClassDefFoundError" in the application server log

Nick Vigilante — Mon, 17 Apr 2017 16:38:08 GMT

Current Revision posted to Appian Knowledge Base by Nick Vigilante on 4/17/2017 4:38:08 PM

Symptoms

Data fails to be exported to Excel using the shared component, “Download Data Subset”.

An error is seen in the log that indicates a class is missing, despite the plugin previously working. An error similar to the following is seen in the server log:

[[ACTIVE] ExecuteThread: '29' for queue: 'weblogic.kernel.Default (self-tuning)'] ERROR com.appiancorp.ra.workpoller.WorkItemListener - The following exception occurred while attempting to complete work item [(WorkId: 10, WorkType: [ExpressionGroupRequest: expressionGroupId=442, [ExpressionGroup as '1234567' context [Task:123]: isFileCorrect:readexcelsheet(pv!excelDocument_doc,0,1,1).result.values[1]="Instructions" with values
...
Caused by: javax.ejb.EJBException: EJB Exception: : java.lang.NoClassDefFoundError: Could not initialize class org.apache.poi.openxml4j.opc.internal.marshallers.ZipPackagePropertiesMarshaller

Cause

The shared component, “Excel Tools”, contains a newer version of the same class referenced by “Download Data Subset”, causing a class loader conflict.

Action

Remove “Download Data Subset” from the environment.
Delete all old versions of the Exportable DataSubset CDT.
Install the newer shared component, “Excel Tools” as it contains the same functions and supersedes “Download Data Subset”.
Update your process models to point to the new version of {urn:com:appian:ps:excel:types}ExportableDataSubset.

Affected Versions

This article applies to all versions of Appian.

Last Reviewed: April 2017

Tags: plug-ins

KB-1285 Excel Tools throws "java.lang.NoClassDefFoundError" in the application server log

Nick Vigilante — Tue, 07 Mar 2017 16:03:12 GMT

Revision 1 posted to Appian Knowledge Base by Nick Vigilante on 3/7/2017 4:03:12 PM

Symptoms

Data fails to be exported to Excel using the shared component, “Download Data Subset”.

An error is seen in the log that indicates a class is missing, despite the plugin previously working. An error similar to the following is seen in the server log:

[[ACTIVE] ExecuteThread: '29' for queue: 'weblogic.kernel.Default (self-tuning)'] ERROR com.appiancorp.ra.workpoller.WorkItemListener - The following exception occurred while attempting to complete work item [(WorkId: 10, WorkType: [ExpressionGroupRequest: expressionGroupId=442, [ExpressionGroup as '1234567' context [Task:123]: isFileCorrect:readexcelsheet(pv!excelDocument_doc,0,1,1).result.values[1]="Instructions" with values
...
Caused by: javax.ejb.EJBException: EJB Exception: : java.lang.NoClassDefFoundError: Could not initialize class org.apache.poi.openxml4j.opc.internal.marshallers.ZipPackagePropertiesMarshaller

Cause

The shared component, “Excel Tools”, contains a newer version of the same class referenced by “Download Data Subset”, causing a class loader conflict.

Action

Install the newer shared component, “Excel Tools” as it contains the same functions and supersedes “Download Data Subset”.
1. When deploying the new plugin, please delete all old versions of the ExportableDataSubset CDT AND update your model to point to the new version {urn:com:appian:ps:excel:types}ExportableDataSubset.
Remove “Download Data Subset” from the environment after installing Excel Tools.

Affected Versions

This article applies to all versions of Appian.

Last Reviewed: March 2017

Tags: shared components

KB-1285 Excel Tools throws "java.lang.NoClassDefFoundError" in the application server log

Nick Vigilante — Tue, 07 Mar 2017 15:49:29 GMT

Revision 2 posted to Appian Knowledge Base by Nick Vigilante on 3/7/2017 3:49:29 PM

Symptoms

Data fails to be exported to Excel using the shared component, “Download Data Subset”.

An error is seen in the log that indicates a class is missing, despite the plugin previously working. An error similar to the following is seen in the server log:

[[ACTIVE] ExecuteThread: '29' for queue: 'weblogic.kernel.Default (self-tuning)'] ERROR com.appiancorp.ra.workpoller.WorkItemListener - The following exception occurred while attempting to complete work item [(WorkId: 10, WorkType: [ExpressionGroupRequest: expressionGroupId=442, [ExpressionGroup as '1234567' context [Task:123]: isFileCorrect:readexcelsheet(pv!excelDocument_doc,0,1,1).result.values[1]="Instructions" with values
...
Caused by: javax.ejb.EJBException: EJB Exception: : java.lang.NoClassDefFoundError: Could not initialize class org.apache.poi.openxml4j.opc.internal.marshallers.ZipPackagePropertiesMarshaller

Cause

The shared component, “Excel Tools”, contains a newer version of the same class referenced by “Download Data Subset”, causing a class loader conflict.

Action

Remove “Download Data Subset” from the environment after installing Excel Tools.
Delete all old versions of the Exportable DataSubset CDT.
Install the newer shared component, “Excel Tools” as it contains the same functions and supersedes “Download Data Subset”.
Update your process models to poinmt to the new version of {urn:com:appian:ps:excel:types}ExportableDataSubset.

Affected Versions

This article applies to all versions of Appian.

Last Reviewed: March 2017

Tags: shared components