tke-gecko opened a new issue, #7423:
URL: https://github.com/apache/hop/issues/7423
### Apache Hop version?
2.18.1
### Java version?
21.0.2
### Operating system
Windows
### What happened?
In a pipeline I want to run some command on a remote server (Ubuntu 24.04.4
server) using the SSH transform. When I configure the transform and use the
button "Test connection", Apache Hop freezes and the log shows the following
exception:
```
Exception in thread "Thread-7" java.lang.NoClassDefFoundError:
com/google/crypto/tink/subtle/Ed25519Verify
at
com.trilead.ssh2.signature.Ed25519Verify.verifySignature(Ed25519Verify.java:138)
at
com.trilead.ssh2.transport.KexManager.verifySignature(KexManager.java:583)
at
com.trilead.ssh2.transport.KexManager.handleMessage(KexManager.java:874)
at
com.trilead.ssh2.transport.TransportManager.receiveLoop(TransportManager.java:614)
at
com.trilead.ssh2.transport.TransportManager$1.run(TransportManager.java:322)
at java.base/java.lang.Thread.run(Thread.java:1583)
Caused by: java.lang.ClassNotFoundException: Unable to load class
'com.google.crypto.tink.subtle.Ed25519Verify' in this classloader or in the
parent
at
org.apache.hop.core.plugins.HopURLClassLoader.loadClass(HopURLClassLoader.java:97)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:526)
... 6 more
Caused by: java.lang.ClassNotFoundException:
com.google.crypto.tink.subtle.Ed25519Verify
at
java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:445)
at
org.apache.hop.core.plugins.HopURLClassLoader.loadClassFromThisLoader(HopURLClassLoader.java:67)
at
org.apache.hop.core.plugins.HopURLClassLoader.loadClass(HopURLClassLoader.java:92)
... 7 more
```
The same happens when I start the pipeline. Here is the XML code of the
pipeline:
```xml
<?xml version="1.0" encoding="UTF-8"?>
<pipeline>
<info>
<capture_transform_performance>N</capture_transform_performance>
<transform_performance_capturing_delay>1000</transform_performance_capturing_delay>
<transform_performance_capturing_size_limit>100</transform_performance_capturing_size_limit>
<pipeline_type>Normal</pipeline_type>
<pipeline_status>-1</pipeline_status>
<parameters/>
<name>New pipeline</name>
<name_sync_with_filename>Y</name_sync_with_filename>
<created_user>-</created_user>
<modified_user>-</modified_user>
<created_date>2026/07/02 10:55:44.764</created_date>
<modified_date>2026/07/02 10:55:44.764</modified_date>
</info>
<transform>
<type>SSH</type>
<name>Run Checker Script via SSH</name>
<command>${CHECK_COMMAND}</command>
<dynamicCommandField>N</dynamicCommandField>
<commandfieldname/>
<serverName>${PRIMARY_NODE}</serverName>
<port>22</port>
<userName>${SSH_USER}</userName>
<password>${SSH_PASSWORD}</password>
<usePrivateKey>N</usePrivateKey>
<keyFileName/>
<passPhrase/>
<stdOutFieldName>stdOut</stdOutFieldName>
<stdErrFieldName>stdErr</stdErrFieldName>
<timeOut>0</timeOut>
<proxyHost/>
<proxyPort/>
<proxyUsername/>
<proxyPassword/>
<distribute>Y</distribute>
<copies>1</copies>
<GUI>
<xloc>208</xloc>
<yloc>160</yloc>
</GUI>
<partitioning>
<method>none</method>
<schema_name/>
</partitioning>
<attributes/>
</transform>
<order/>
<notepads/>
<attributes/>
<transform_error_handling/>
</pipeline>
```
When I download the library referenced in the exception (I used the jar file
from https://repo1.maven.org/maven2/com/google/crypto/tink/tink/1.22.0/ ) and
put it into `lib/core`, the same pipeline works as expected.
### Issue Priority
Priority: 2
### Issue Component
Component: Transforms
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