Karaf log many WARNs when OVS 2.4 connects to controller

When I connect OVS 2.4 to controller, I see too many exceptions filling up several karaf log files. I understand some WARN or ERROR is needed but is it possible to reduce the number? If we cannot easily fix this, we can always release note this issue so users are not alarmed.

2016-01-29 18:36:05,600 | WARN | entLoopGroup-5-2 | ListDeserializer | 172 - org.opendaylight.openflowjava.openflow-protocol-impl - 0.7.0.SNAPSHOT | Problem during reading table feature property. Skipping unknown feature property: msgVersion: 4 objectClass: org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev150225.match.entries.grouping.MatchEntry msgType: 1 oxm_field: 31 experimenterID: null
java.lang.IllegalStateException: Deserializer for key: msgVersion: 4 objectClass: org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev150225.match.entries.grouping.MatchEntry msgType: 1 oxm_field: 31 experimenterID: null was not found - please verify that all needed deserializers ale loaded correctly
at org.opendaylight.openflowjava.protocol.impl.deserialization.DeserializerRegistryImpl.getDeserializer(DeserializerRegistryImpl.java:69)[172:org.opendaylight.openflowjava.openflow-protocol-impl:0.7.0.SNAPSHOT]
at org.opendaylight.openflowjava.protocol.impl.util.ListDeserializer.deserializeHeaders(ListDeserializer.java:80)[172:org.opendaylight.openflowjava.openflow-protocol-impl:0.7.0.SNAPSHOT]
at org.opendaylight.openflowjava.protocol.impl.deserialization.factories.MultipartReplyMessageFactory.createTableFeaturesProperties(MultipartReplyMessageFactory.java:444)[172:org.opendaylight.openflowjava.openflow-protocol-impl:0.7.0.SNAPSHOT]
at org.opendaylight.openflowjava.protocol.impl.deserialization.factories.MultipartReplyMessageFactory.setTableFeatures(MultipartReplyMessageFactory.java:379)[172:org.opendaylight.openflowjava.openflow-protocol-impl:0.7.0.SNAPSHOT]
at org.opendaylight.openflowjava.protocol.impl.deserialization.factories.MultipartReplyMessageFactory.deserialize(MultipartReplyMessageFactory.java:232)[172:org.opendaylight.openflowjava.openflow-protocol-impl:0.7.0.SNAPSHOT]
at org.opendaylight.openflowjava.protocol.impl.deserialization.factories.MultipartReplyMessageFactory.deserialize(MultipartReplyMessageFactory.java:149)[172:org.opendaylight.openflowjava.openflow-protocol-impl:0.7.0.SNAPSHOT]
at org.opendaylight.openflowjava.protocol.impl.deserialization.DeserializationFactory.deserialize(DeserializationFactory.java:59)[172:org.opendaylight.openflowjava.openflow-protocol-impl:0.7.0.SNAPSHOT]
at org.opendaylight.openflowjava.protocol.impl.core.OFDecoder.decode(OFDecoder.java:55)[172:org.opendaylight.openflowjava.openflow-protocol-impl:0.7.0.SNAPSHOT]
at org.opendaylight.openflowjava.protocol.impl.core.OFDecoder.decode(OFDecoder.java:28)[172:org.opendaylight.openflowjava.openflow-protocol-impl:0.7.0.SNAPSHOT]
at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:89)[125:io.netty.codec:4.0.33.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:318)[124:io.netty.transport:4.0.33.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:304)[124:io.netty.transport:4.0.33.Final]
at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:276)[125:io.netty.codec:4.0.33.Final]
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:263)[125:io.netty.codec:4.0.33.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:318)[124:io.netty.transport:4.0.33.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:304)[124:io.netty.transport:4.0.33.Final]
at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:276)[125:io.netty.codec:4.0.33.Final]
at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:354)[125:io.netty.codec:4.0.33.Final]
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:244)[125:io.netty.codec:4.0.33.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:318)[124:io.netty.transport:4.0.33.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:304)[124:io.netty.transport:4.0.33.Final]
at io.netty.handler.timeout.ReadTimeoutHandler.channelRead(ReadTimeoutHandler.java:152)[127:io.netty.handler:4.0.33.Final]
at org.opendaylight.openflowjava.protocol.impl.core.IdleHandler.channelRead(IdleHandler.java:39)[172:org.opendaylight.openflowjava.openflow-protocol-impl:0.7.0.SNAPSHOT]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:318)[124:io.netty.transport:4.0.33.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:304)[124:io.netty.transport:4.0.33.Final]
at io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:86)[124:io.netty.transport:4.0.33.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:318)[124:io.netty.transport:4.0.33.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:304)[124:io.netty.transport:4.0.33.Final]
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:846)[124:io.netty.transport:4.0.33.Final]
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:131)[124:io.netty.transport:4.0.33.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:511)[124:io.netty.transport:4.0.33.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468)[124:io.netty.transport:4.0.33.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382)[124:io.netty.transport:4.0.33.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:349)[124:io.netty.transport:4.0.33.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:112)[123:io.netty.common:4.0.33.Final]
at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:137)[123:io.netty.common:4.0.33.Final]
at java.lang.Thread.run(Thread.java:745)[:1.7.0_79]