sijie commented on issue #6683: [broker]Handle BadVersionException thrown by 
updateSchemaLocator()
URL: https://github.com/apache/pulsar/pull/6683#issuecomment-611980153
 
 
   @cdbartholomew I have just reproduced the issue in 2.5.0. thanks
   
   ```
   [sijie@sijies-mbp apache-pulsar-2.5.0]$ clear
   [sijie@sijies-mbp apache-pulsar-2.5.0]$ curl 
localhost:8080/admin/v2/brokers/health
   ok[sijie@sijies-mbp apache-pulsar-2.5.0]$ curl 
localhost:8080/admin/v2/brokers/health
   
    --- An unexpected error occurred in the server ---
   
   Message: org.apache.pulsar.client.api.PulsarClientException: 
org.apache.zookeeper.KeeperException$BadVersionException: KeeperErrorCode = 
BadVersion
   
   Stacktrace:
   
   java.util.concurrent.CompletionException: 
org.apache.pulsar.client.api.PulsarClientException: 
org.apache.zookeeper.KeeperException$BadVersionException: KeeperErrorCode = 
BadVersion
        at 
java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:292)
        at 
java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:308)
        at 
java.util.concurrent.CompletableFuture.biRelay(CompletableFuture.java:1284)
        at 
java.util.concurrent.CompletableFuture$BiRelay.tryFire(CompletableFuture.java:1270)
        at 
java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474)
        at 
java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:1977)
        at 
org.apache.pulsar.client.impl.ProducerImpl.lambda$connectionOpened$13(ProducerImpl.java:1176)
        at 
java.util.concurrent.CompletableFuture.uniExceptionally(CompletableFuture.java:870)
        at 
java.util.concurrent.CompletableFuture$UniExceptionally.tryFire(CompletableFuture.java:852)
        at 
java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474)
        at 
java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:1977)
        at 
org.apache.pulsar.client.impl.ClientCnx.handleError(ClientCnx.java:606)
        at 
org.apache.pulsar.common.protocol.PulsarDecoder.channelRead(PulsarDecoder.java:171)
        at 
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374)
        at 
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360)
        at 
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:352)
        at 
io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:326)
        at 
io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:300)
        at 
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374)
        at 
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360)
        at 
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:352)
        at 
io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1422)
        at 
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374)
        at 
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360)
        at 
io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:931)
        at 
io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163)
        at 
io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:700)
        at 
io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:635)
        at 
io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:552)
        at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:514)
        at 
io.netty.util.concurrent.SingleThreadEventExecutor$6.run(SingleThreadEventExecutor.java:1050)
        at 
io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
        at 
io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
        at java.lang.Thread.run(Thread.java:748)
   Caused by: org.apache.pulsar.client.api.PulsarClientException: 
org.apache.zookeeper.KeeperException$BadVersionException: KeeperErrorCode = 
BadVersion
        at 
org.apache.pulsar.client.impl.ClientCnx.getPulsarClientException(ClientCnx.java:1002)
        ... 23 more
   ```

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