ibessonov commented on code in PR #6161:
URL: https://github.com/apache/ignite-3/pull/6161#discussion_r2177372372
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modules/network/src/main/java/org/apache/ignite/internal/network/direct/stream/DirectByteBufferStreamImplV1.java:
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@@ -73,6 +74,23 @@
* {@link DirectByteBufferStream} implementation.
*/
public class DirectByteBufferStreamImplV1 implements DirectByteBufferStream {
+ /**
+ * There's a binary incompatibility between Apache Ignite 3.0 and later
versions due to the bug in 3.0. If someone wants to upgrade from
+ * 3.0 to any other version on AARCH64 architecture or other architecture
that was considered "not unaligned" in Ignite 3.0, they need
+ * to set this system property to {@code true}.
+ *
+ * @see #writeUuidLong(long, long)
+ * @see #readUuidLong(long)
+ * @see #unaligned30()
+ */
+ private static final String IGNITE_30_3X_COMPATIBILITY_PROPERTY =
"IGNITE_30_3X_UUIDS_SERIALIZATION_COMPATIBILITY";
Review Comment:
> how will the user understand that this is the problem?
We will have to document it
> Maybe we already write somewhere which PDS on which version the node
directory was created and then write a warning.
Not going to work, most likely, for a complicated reason that I might
explain later if you ask. It will require a lot of thinking to make this
approach work
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