Caused by: java.lang.UnsupportedOperationException
at java.lang.invoke.VarForm.getMemberName(VarForm.java:118) ~[?:?]
at org.neo4j.internal.unsafe.UnsafeUtil.initDirectByteBuffer(UnsafeUtil.java:668) ~[neo4j-unsafe-5.7.0.jar:5.7.0]
at org.neo4j.internal.unsafe.UnsafeUtil.newDirectByteBuffer(UnsafeUtil.java:651) ~[neo4j-unsafe-5.7.0.jar:5.7.0]
at org.neo4j.io.pagecache.impl.UnsafeBlockSwapper.createAndGetNewBuffer(UnsafeBlockSwapper.java:46) ~[neo4j-io-5.7.0.jar:5.7.0]
at org.neo4j.io.pagecache.impl.UnsafeBlockSwapper.proxy(UnsafeBlockSwapper.java:40) ~[neo4j-io-5.7.0.jar:5.7.0]
at org.neo4j.io.pagecache.impl.UnsafeBlockSwapper.swapIn(UnsafeBlockSwapper.java:59) ~[neo4j-io-5.7.0.jar:5.7.0]

Backup Command :

neo4j-admin database backup --from=poc.neo4j.com:6362 --type=full --pagecache=2G --to-path=/opt sampletest --verbose 

Cause:

The occurrence of this error is attributed to the presence of an unsupported Java Development Kit (JDK) version installed on the remote machine. It is imperative to note that Neo4j 5 requires JDK17 for proper functionality. 

Fix:

To resolve this issue, upgrade the JDK on the remote machine to version 17. After the upgrade is complete, rerun the remote backup process to ensure seamless compatibility with Neo4j 5.