Cassandra节点工具修复 - 内存不足错误

Question

我有卡桑德拉Datastax 2.2.3集群（只有一个节点），并且作为测试，我添加了一个新节点。在成功添加新节点并以bootstrap=false开始之后，我试图用nodetool repair将其与之重新绑定。

ERROR [SharedPool-Worker-142] 2015-10-30 14:02:41,993 JVMStabilityInspector.java:117 - JVM state determined to be unstable. Exiting forcefully due to: 
java.lang.OutOfMemoryError: Java heap space 
    at java.nio.HeapByteBuffer.<init>(HeapByteBuffer.java:57) ~[na:1.7.0_80] 
    at java.nio.ByteBuffer.allocate(ByteBuffer.java:331) ~[na:1.7.0_80] 
    at org.apache.cassandra.utils.memory.SlabAllocator.getRegion(SlabAllocator.java:137) ~[apache-cassandra-2.2.3.jar:2.2.3] 
    at org.apache.cassandra.utils.memory.SlabAllocator.allocate(SlabAllocator.java:97) ~[apache-cassandra-2.2.3.jar:2.2.3] 
    at org.apache.cassandra.utils.memory.ContextAllocator.allocate(ContextAllocator.java:57) ~[apache-cassandra-2.2.3.jar:2.2.3] 
    at org.apache.cassandra.utils.memory.ContextAllocator.clone(ContextAllocator.java:47) ~[apache-cassandra-2.2.3.jar:2.2.3] 
    at org.apache.cassandra.utils.memory.MemtableBufferAllocator.clone(MemtableBufferAllocator.java:61) ~[apache-cassandra-2.2.3.jar:2.2.3] 
    at org.apache.cassandra.db.Memtable.put(Memtable.java:209) ~[apache-cassandra-2.2.3.jar:2.2.3] 
    at org.apache.cassandra.db.ColumnFamilyStore.apply(ColumnFamilyStore.java:1244) ~[apache-cassandra-2.2.3.jar:2.2.3] 
    at org.apache.cassandra.db.Keyspace.apply(Keyspace.java:406) ~[apache-cassandra-2.2.3.jar:2.2.3] 
    at org.apache.cassandra.db.Keyspace.apply(Keyspace.java:366) ~[apache-cassandra-2.2.3.jar:2.2.3] 
    at org.apache.cassandra.db.Mutation.apply(Mutation.java:214) ~[apache-cassandra-2.2.3.jar:2.2.3] 
    at org.apache.cassandra.db.MutationVerbHandler.doVerb(MutationVerbHandler.java:50) ~[apache-cassandra-2.2.3.jar:2.2.3] 
    at org.apache.cassandra.net.MessageDeliveryTask.run(MessageDeliveryTask.java:66) ~[apache-cassandra-2.2.3.jar:2.2.3] 
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) ~[na:1.7.0_80] 
    at org.apache.cassandra.concurrent.AbstractTracingAwareExecutorService$FutureTask.run(AbstractTracingAwareExecutorService.java:164) ~[apache-cassandra-2.2.3.jar:2.2.3] 
    at org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:105) [apache-cassandra-2.2.3.jar:2.2.3] 
    at java.lang.Thread.run(Thread.java:745) [na:1.7.0_80] 

这：

然而，这个错误在旧节点的日志弹出

ERROR [SharedPool-Worker-126] 2015-10-30 14:02:04,049 SEPWorker.java:141 - Failed to execute task, unexpected exception killed worker: {} 
java.lang.IllegalStateException: Shutdown in progress 
    at java.lang.ApplicationShutdownHooks.remove(ApplicationShutdownHooks.java:82) ~[na:1.7.0_80] 
    at java.lang.Runtime.removeShutdownHook(Runtime.java:239) ~[na:1.7.0_80] 
    at org.apache.cassandra.service.StorageService.removeShutdownHook(StorageService.java:728) ~[apache-cassandra-2.2.3.jar:2.2.3] 
    at org.apache.cassandra.utils.JVMStabilityInspector$Killer.killCurrentJVM(JVMStabilityInspector.java:119) ~[apache-cassandra-2.2.3.jar:2.2.3] 
    at org.apache.cassandra.utils.JVMStabilityInspector$Killer.killCurrentJVM(JVMStabilityInspector.java:109) ~[apache-cassandra-2.2.3.jar:2.2.3] 
    at org.apache.cassandra.utils.JVMStabilityInspector.inspectThrowable(JVMStabilityInspector.java:68) ~[apache-cassandra-2.2.3.jar:2.2.3] 
    at org.apache.cassandra.concurrent.AbstractTracingAwareExecutorService$FutureTask.run(AbstractTracingAwareExecutorService.java:168) ~[apache-cassandra-2.2.3.jar:2.2.3] 
    at org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:105) ~[apache-cassandra-2.2.3.jar:2.2.3] 
    at java.lang.Thread.run(Thread.java:745) [na:1.7.0_80] 

和修复失败：

Repair session 24406790-8014-11e5-bf74-a1fb6926eba3 for range (8334390792461377170,8383846774169681811] failed with error Endpoint /x.x.x.x died 

我试着运行nodetool repair -seq - 结果是一样的。

有问题？

• nodetool修复需要多少内存？如何检查？
• 我该如何重新平衡戒指？有什么方法可以一步步触发修复吗？
• 如果不是，我可以添加“虚拟”RAM（也许作为交换），增加堆并触发修复？

Answer 1

运行修复不会重新平衡环。你想要的是在新节点上运行nodetool rebuild以将数据传输到它。