I get the following error when I try to transfer a file to a FTP folder. I haven’t had this issue with versions before 4.6.0.
Is there anything I could do? Thanks!
ERROR Transfer Files 3:41 Execute failed: Unable to make field private final sun.security.util.Cache sun.security.ssl.SSLSessionContextImpl.sessionHostPortCache accessible: module java.base does not "opens sun.security.ssl" to unnamed module @3c865a8
thanks! It’s a pretty simple workflow: I want to upload a CSV to a FTP folder. I use the following workflow:
And there I get the error message from my first post:
ERROR CSV Writer 4:16 Execute failed: Unable to make field private final sun.security.util.Cache sun.security.ssl.SSLSessionContextImpl.sessionHostPortCache accessible: module java.base does not "opens sun.security.ssl" to unnamed module @69231cd1
The problem is likely related to the Java 17 update. Can you post the complete stack trace of the error from KNIME’s log file? This will be helpful to narrow down the issue.
2022-06-30 21:01:04,376 : WARN : KNIME-Worker-10-Excel Reader 3:39 : : Node : Transfer Files : 3:41 : No connection available. Execute the connector node first.
2022-06-30 21:01:04,917 : ERROR : KNIME-Worker-5-CSV Writer 3:16 : : Node : CSV Writer : 3:16 : Execute failed: Unable to make field private final sun.security.util.Cache sun.security.ssl.SSLSessionContextImpl.sessionHostPortCache accessible: module java.base does not "opens sun.security.ssl" to unnamed module @26d2b53e
java.lang.reflect.InaccessibleObjectException: Unable to make field private final sun.security.util.Cache sun.security.ssl.SSLSessionContextImpl.sessionHostPortCache accessible: module java.base does not "opens sun.security.ssl" to unnamed module @26d2b53e
at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(Unknown Source)
at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(Unknown Source)
at java.base/java.lang.reflect.Field.checkCanSetAccessible(Unknown Source)
at java.base/java.lang.reflect.Field.setAccessible(Unknown Source)
at org.knime.ext.ftp.filehandling.fs.FtpsClientWithSslSessionReuse._prepareDataSocket_(FtpsClientWithSslSessionReuse.java:148)
at org.apache.commons.net.ftp.FTPSClient._openDataConnection_(FTPSClient.java:623)
at org.apache.commons.net.ftp.FTPClient._storeFileStream(FTPClient.java:719)
at org.apache.commons.net.ftp.FTPClient.storeFileStream(FTPClient.java:706)
at org.apache.commons.net.ftp.FTPClient.storeFileStream(FTPClient.java:2060)
at org.knime.ext.ftp.filehandling.fs.FtpClient.openForRewrite(FtpClient.java:258)
at org.knime.ext.ftp.filehandling.fs.FtpFileSystemProvider.newOutputStreamInternal(FtpFileSystemProvider.java:208)
at org.knime.ext.ftp.filehandling.fs.FtpFileSystemProvider.newOutputStreamInternal(FtpFileSystemProvider.java:1)
at org.knime.filehandling.core.connections.base.BaseFileSystemProvider.newOutputStream(BaseFileSystemProvider.java:500)
at java.base/java.nio.file.Files.newOutputStream(Unknown Source)
at org.knime.filehandling.core.connections.FSFiles.newOutputStream(FSFiles.java:136)
at org.knime.base.node.io.filehandling.csv.writer.CSVWriter2NodeModel.createOutputStream(CSVWriter2NodeModel.java:214)
at org.knime.base.node.io.filehandling.csv.writer.CSVWriter2NodeModel.writeToFile(CSVWriter2NodeModel.java:167)
at org.knime.base.node.io.filehandling.csv.writer.CSVWriter2NodeModel.execute(CSVWriter2NodeModel.java:147)
at org.knime.base.node.io.filehandling.csv.writer.CSVWriter2NodeModel.execute(CSVWriter2NodeModel.java:1)
at org.knime.core.node.NodeModel.executeModel(NodeModel.java:549)
at org.knime.core.node.Node.invokeFullyNodeModelExecute(Node.java:1267)
at org.knime.core.node.Node.execute(Node.java:1041)
at org.knime.core.node.workflow.NativeNodeContainer.performExecuteNode(NativeNodeContainer.java:595)
at org.knime.core.node.exec.LocalNodeExecutionJob.mainExecute(LocalNodeExecutionJob.java:95)
at org.knime.core.node.workflow.NodeExecutionJob.internalRun(NodeExecutionJob.java:201)
at org.knime.core.node.workflow.NodeExecutionJob.run(NodeExecutionJob.java:117)
at org.knime.core.util.ThreadUtils$RunnableWithContextImpl.runWithContext(ThreadUtils.java:367)
at org.knime.core.util.ThreadUtils$RunnableWithContext.run(ThreadUtils.java:221)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.base/java.util.concurrent.FutureTask.run(Unknown Source)
at org.knime.core.util.ThreadPool$MyFuture.run(ThreadPool.java:123)
at org.knime.core.util.ThreadPool$Worker.run(ThreadPool.java:246)
Execute failed: Unable to make public synchronized void sun.security.util.MemoryCache.put(java.lang.Object,java.lang.Object) accessible: module java.base does not "opens sun.security.util" to unnamed module @235d7467