dawidwys commented on a change in pull request #6711: [FLINK-9377] [core, state backends] Remove serializers from checkpoints URL: https://github.com/apache/flink/pull/6711#discussion_r220212410
########## File path: flink-core/src/main/java/org/apache/flink/api/common/typeutils/BackwardsCompatibleConfigSnapshot.java ########## @@ -0,0 +1,134 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.apache.flink.api.common.typeutils; + +import org.apache.flink.annotation.Internal; +import org.apache.flink.annotation.VisibleForTesting; +import org.apache.flink.core.memory.DataInputView; +import org.apache.flink.core.memory.DataOutputView; +import org.apache.flink.util.Preconditions; + +import javax.annotation.Nonnull; +import javax.annotation.Nullable; +import java.io.IOException; +import java.util.Objects; + +/** + * A utility {@link TypeSerializerConfigSnapshot} that is used for backwards compatibility purposes. + * + * <p>In older versions of Flink (<= 1.6), we used to write state serializers into checkpoints, along + * with the serializer's configuration snapshot. Since 1.7.0, we no longer wrote the serializers, but + * instead used the configuration snapshot as a factory to instantiate serializers for restoring state. Review comment: `used` -> `use` ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services