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CNDB-14650: allow mixed mode repair #2098

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CNDB-14650: allow mixed mode repair #2098

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7 changes: 7 additions & 0 deletions src/java/org/apache/cassandra/config/CassandraRelevantProperties.java
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Original file line number Diff line number Diff line change
Expand Up @@ -256,6 +256,13 @@ public enum CassandraRelevantProperties
*/
REPAIR_PARENT_SESSION_LISTENER("cassandra.custom_parent_repair_session_listener_class"),

/**
* Allow repair in mixed major version clusters. When false (default), repair operations
* will fail in clusters with mixed major versions unless explicitly allowed.
* Set to true to allow repair during rolling upgrades.
*/
ALLOW_MIXED_REPAIR("cassandra.allow_mixed_repair", "false"),

//cassandra properties (without the "cassandra." prefix)

/**
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13 changes: 10 additions & 3 deletions src/java/org/apache/cassandra/repair/messages/PrepareMessage.java
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Expand Up @@ -26,6 +26,8 @@

import com.google.common.base.Preconditions;

import org.apache.cassandra.config.CassandraRelevantProperties;

import org.apache.cassandra.db.TypeSizes;
import org.apache.cassandra.dht.IPartitioner;
import org.apache.cassandra.dht.Range;
Expand All @@ -41,6 +43,8 @@

public class PrepareMessage extends RepairMessage
{
private static final boolean ALLOW_MIXED_REPAIR = CassandraRelevantProperties.ALLOW_MIXED_REPAIR.getBoolean();

public final List<TableId> tableIds;
public final Collection<Range<Token>> ranges;

Expand Down Expand Up @@ -84,13 +88,15 @@ public int hashCode()
}

private static final String MIXED_MODE_ERROR = "Some nodes involved in repair are on an incompatible major version. " +
"Repair is not supported in mixed major version clusters.";
"Repair is not supported in mixed major version clusters. " +
"To allow repair during rolling upgrades, set -Dcassandra.allow_mixed_repair=true";

public static final IVersionedSerializer<PrepareMessage> serializer = new IVersionedSerializer<PrepareMessage>()
{
public void serialize(PrepareMessage message, DataOutputPlus out, int version) throws IOException
{
Preconditions.checkArgument(version == MessagingService.current_version, MIXED_MODE_ERROR);
if (!ALLOW_MIXED_REPAIR)
Preconditions.checkArgument(version == MessagingService.current_version, MIXED_MODE_ERROR);

out.writeInt(message.tableIds.size());
for (TableId tableId : message.tableIds)
Expand All @@ -110,7 +116,8 @@ public void serialize(PrepareMessage message, DataOutputPlus out, int version) t

public PrepareMessage deserialize(DataInputPlus in, int version) throws IOException
{
Preconditions.checkArgument(version == MessagingService.current_version, MIXED_MODE_ERROR);
if (!ALLOW_MIXED_REPAIR)
Preconditions.checkArgument(version == MessagingService.current_version, MIXED_MODE_ERROR);

int tableIdCount = in.readInt();
List<TableId> tableIds = new ArrayList<>(tableIdCount);
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