RE: [EXTERNAL] Re: Unexpected exception calling VelocityEngine.mergeTemplate when using 2.4 or 2.4.1

Thanks for taking time to look into this.
I know the template and I have updated it to make it even simpler. The curr=
ent template is currently set to the text "Hi", without quotes.

p-nio-8080-exec-3] o.a.v.parser - FDMS Self-Reg Invite Subject: offset -1, =
count 5, length 4096
java.lang.StringIndexOutOfBoundsException: offset -1, count 5, length 4096


The initialization code is the following:

        final var props =3D new Properties();
        props.put("resource.loaders", "ds");
        props.put("resource.loader.ds.class", "org.apache.velocity.runtime.=
resource.loader.DataSourceResourceLoader");
        props.put("resource.loader.ds.resource.table", velocityProperties.g=
etTableName());
        props.put("resource.loader.ds.resource.key_column", velocityPropert=
ies.getKeyColumnName());
        props.put("resource.loader.ds.resource.template_column", velocityPr=
operties.getTemplateColumnName());
        props.put("resource.loader.ds.resource.timestamp_column", velocityP=
roperties.getTimestampColumnName());
        final var dsLoader =3D new DataSourceResourceLoader();
        dsLoader.setDataSource(dataSource);
        props.put("resource.loader.ds.instance", dsLoader);
        props.put("resource.loader.ds.cache", "true");
        props.put("runtime.log.logsystem.class", "org.apache.velocity.runti=
me.log.NullLogSystem");
        props.put(RuntimeConstants.RESOURCE_MANAGER_INSTANCE, velocityResou=
rceManager);
        final var mailVelocityEngine =3D new VelocityEngine(props);
        mailVelocityEngine.init();

(velocityProperties is an object to hold string values. dataSource is a jav=
ax.sql.DataSource, velocityResourceManager is a subclass of org.apache.velo=
city.runtime.resource.ResourceManagerImpl)

If there's anything else you think I should try or can provide you, please =
let me know. Thanks!

-----Original Message-----
From: Claude Brisson <[email protected]>=20
Sent: Thursday, June 12, 2025 02:27 AM
To: Kish, Robert [AG] <[email protected]>; Velocity Users List =
<[email protected]>
Subject: [EXTERNAL] Re: Unexpected exception calling VelocityEngine.mergeTe=
mplate when using 2.4 or 2.4.1

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Since it happens during the parsing, it means that it only depends on the t=
emplate itself, not to the values provided to it.

So if you are able to log the template location, you will know the problema=
tic template at least.

I'm going to try to pinpoint the problem with the stack trace you provided =
and let you know if I am able to identify the cause.

On 10/06/2025 23:50, Kish, Robert [AG] wrote:
> Hello!
>
> We have 2 similar environments and under Velocity Engine 2.3, the code wo=
rks as expected and we get back the template from the API call.
> But when upgrading to 2.4.1 (or trying 2.4) one of our environments fails=
 with an exception. Unfortunately, it's in an environment where I can't use=
 a debugger.
>
> I'm looking for ideas on how to resolve this issue or identify a specific=
 bug that can be reported to the Velocity Team for resolution.
>
> Log + Exception
> o.a.v.macro - autoload off: VM system will not automatically reload=20
> global library macros o.a.v.parser - XXXXXXXXXXXXXXXXXXXXXXXXXXXX:=20
> offset -1, count 79, length 4096
> java.lang.StringIndexOutOfBoundsException: offset -1, count 79, length 40=
96
>          at java.base/java.lang.String.checkBoundsOffCount(String.java:33=
04) ~[?:?]
>          at java.base/java.lang.String.rangeCheck(String.java:280) ~[?:?]
>          at java.base/java.lang.String.<init>(String.java:276) ~[?:?]
>                 at org.apache.velocity.runtime.parser.VelocityCharStream.=
GetImage(VelocityCharStream.java:434) ~[velocity-engine-core-2.4.jar:2.4]
>          at org.apache.velocity.runtime.parser.StandardParserTokenManager=
.jjFillToken(StandardParserTokenManager.java:7796) ~[velocity-engine-core-2=
.4.jar:2.4]
>          at org.apache.velocity.runtime.parser.StandardParserTokenManager=
.getNextToken(StandardParserTokenManager.java:7866) ~[velocity-engine-core-=
2.4.jar:2.4]
>          at org.apache.velocity.runtime.parser.StandardParser.jj_scan_tok=
en(StandardParser.java:5611) ~[velocity-engine-core-2.4.jar:2.4]
>          at org.apache.velocity.runtime.parser.StandardParser.jj_3R_Endin=
gZeroWidthWhitespace_1591_5_49(StandardParser.java:5448) ~[velocity-engine-=
core-2.4.jar:2.4]
>          at org.apache.velocity.runtime.parser.StandardParser.jj_3_3(Stan=
dardParser.java:5454) ~[velocity-engine-core-2.4.jar:2.4]
>          at org.apache.velocity.runtime.parser.StandardParser.jj_2_3(Stan=
dardParser.java:3886) ~[velocity-engine-core-2.4.jar:2.4]
>          at org.apache.velocity.runtime.parser.StandardParser.Statement(S=
tandardParser.java:654) ~[velocity-engine-core-2.4.jar:2.4]
>          at org.apache.velocity.runtime.parser.StandardParser.process(Sta=
ndardParser.java:495) ~[velocity-engine-core-2.4.jar:2.4]
>          at org.apache.velocity.runtime.parser.StandardParser.parse(Stand=
ardParser.java:184) [velocity-engine-core-2.4.jar:2.4]
>          at org.apache.velocity.runtime.RuntimeInstance.parse(RuntimeInst=
ance.java:1344) [velocity-engine-core-2.4.jar:2.4]
>          at org.apache.velocity.Template.process(Template.java:145) [velo=
city-engine-core-2.4.jar:2.4]
>          at org.apache.velocity.runtime.resource.ResourceManagerImpl.load=
Resource(ResourceManagerImpl.java:429) [velocity-engine-core-2.4.jar:2.4]
>          at org.apache.velocity.runtime.resource.ResourceManagerImpl.getR=
esource(ResourceManagerImpl.java:346) [velocity-engine-core-2.4.jar:2.4]
>          at org.apache.velocity.runtime.RuntimeInstance.getTemplate(Runti=
meInstance.java:1694) [velocity-engine-core-2.4.jar:2.4]
>          at=20
> org.apache.velocity.app.VelocityEngine.mergeTemplate(VelocityEngine.ja
> va:284) [velocity-engine-core-2.4.jar:2.4]
>
> Environment that throws the exception:
> Linux / Tomcat
>
> Server version name:   Apache Tomcat/9.0.104
> Server built:          Apr 4 2025 12:32:55 UTC
> Server version number: 9.0.104.0
> OS Name:               Linux
> OS Version:            4.14.355-277.647.amzn2.x86_64
> Architecture:          amd64
> Java Home:             /usr/lib/jvm/java-11-amazon-corretto.x86_64
> JVM Version:           11.0.27+6-LTS
> JVM Vendor:            Amazon.com Inc.
>
>
> Environment that does not throw the exception:
> Windows / TomEE
>
> INFO: Server version name:   Apache Tomcat (TomEE)/9.0.82 (8.0.16)
> INFO: Server built:          Oct 11 2023 13:15:08 UTC
> INFO: Server version number: 9.0.82.0
> INFO: OS Name:               Windows 11
> INFO: OS Version:            10.0
> INFO: Architecture:          amd64
> INFO: Java Home:             C:\Program Files\Amazon Corretto\jdk11.0.26_=
4
> INFO: JVM Version:           11.0.26+4-LTS
> INFO: JVM Vendor:            Amazon.com Inc.
>
> Robert Kish (Consultant) | Application Developer, IT Application=20
> Services | NJ Dept. of Agriculture
>
> CONFIDENTIALITY NOTICE: The information contained in this communication f=
rom New Jersey Department of Agriculture is privileged and confidential and=
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