Cassandra 服务器抛出 java.lang.AssertionError: DecoratedKey(...) != DecoratedKey [英] Cassandra server throws java.lang.AssertionError: DecoratedKey(...) != DecoratedKey

问题描述

我目前正在试用 Cassandra.

I'm currently experimenting around with Cassandra.

在客户端(使用 Hector)，我查找如下几个键:

On the client-side (with Hector) I look up a few keys like this:

ColumnFamilyResult<String, String> result = template.queryColumns(Arrays.asList("key1","key2","key3"));

大部分时间它似乎都有效.但有时我会在客户端上遇到超时异常:

Most of the time it seems to work. But other times I get a timeout exception on the client:

Caused by: me.prettyprint.hector.api.exceptions.HTimedOutException: TimedOutException()
    at me.prettyprint.cassandra.service.ExceptionsTranslatorImpl.translate(ExceptionsTranslatorImpl.java:35)
    at me.prettyprint.cassandra.service.template.ThriftColumnFamilyTemplate$1.execute(ThriftColumnFamilyTemplate.java:100)
    at me.prettyprint.cassandra.service.template.ThriftColumnFamilyTemplate$1.execute(ThriftColumnFamilyTemplate.java:88)
    at me.prettyprint.cassandra.service.Operation.executeAndSetResult(Operation.java:103)
    at me.prettyprint.cassandra.connection.HConnectionManager.operateWithFailover(HConnectionManager.java:258)
    at me.prettyprint.cassandra.model.ExecutingKeyspace.doExecuteOperation(ExecutingKeyspace.java:97)
    at me.prettyprint.cassandra.service.template.ThriftColumnFamilyTemplate.sliceInternal(ThriftColumnFamilyTemplate.java:88)
    at me.prettyprint.cassandra.service.template.ThriftColumnFamilyTemplate.doExecuteSlice(ThriftColumnFamilyTemplate.java:46)
    at me.prettyprint.cassandra.service.template.ColumnFamilyTemplate.queryColumns(ColumnFamilyTemplate.java:113)
    at info.gamlor.experiments.Cassandra.readObjectByKey(ComplexCassandra.java:255)

Caused by: TimedOutException()
    at org.apache.cassandra.thrift.Cassandra$get_slice_result.read(Cassandra.java:7772)
    at org.apache.cassandra.thrift.Cassandra$Client.recv_get_slice(Cassandra.java:570)
    at org.apache.cassandra.thrift.Cassandra$Client.get_slice(Cassandra.java:542)
    at me.prettyprint.cassandra.service.template.ThriftColumnFamilyTemplate$1.execute(ThriftColumnFamilyTemplate.java:95)

在服务器上出现这个异常:

And on the server this exception shows up:

ERROR 11:33:55,312 Exception in thread Thread[ReadStage:91,5,main]
java.lang.AssertionError: DecoratedKey(4948402862350542345439897754126541659, 6932) != DecoratedKey(132475956107784875457507977471906551877, 726f6f74) in C:	em
pcassandralibcassandradataCassandraPoleposComplexObjectsCassandraPolepos-ComplexObjects-hd-2-Data.db
        at org.apache.cassandra.db.columniterator.SSTableSliceIterator.<init>(SSTableSliceIterator.java:58)
        at org.apache.cassandra.db.filter.SliceQueryFilter.getSSTableColumnIterator(SliceQueryFilter.java:66)
        at org.apache.cassandra.db.filter.QueryFilter.getSSTableColumnIterator(QueryFilter.java:78)
        at org.apache.cassandra.db.CollationController.collectAllData(CollationController.java:256)
        at org.apache.cassandra.db.CollationController.getTopLevelColumns(CollationController.java:63)
        at org.apache.cassandra.db.ColumnFamilyStore.getTopLevelColumns(ColumnFamilyStore.java:1331)
        at org.apache.cassandra.db.ColumnFamilyStore.getColumnFamily(ColumnFamilyStore.java:1193)
        at org.apache.cassandra.db.ColumnFamilyStore.getColumnFamily(ColumnFamilyStore.java:1128)
        at org.apache.cassandra.db.Table.getRow(Table.java:378)
        at org.apache.cassandra.db.SliceFromReadCommand.getRow(SliceFromReadCommand.java:69)
        at org.apache.cassandra.service.StorageProxy$LocalReadRunnable.runMayThrow(StorageProxy.java:816)
        at org.apache.cassandra.service.StorageProxy$DroppableRunnable.run(StorageProxy.java:1250)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
        at java.lang.Thread.run(Thread.java:722)

有时 DecoratedKey(...) 部分中的键值会占用页面.

Sometimes the key-values in the DecoratedKey(...) part takes up pages.

任何人都提示我做错了什么.或者如何调查这个问题.

Anyone a hint what I'm doing wrong. Or how to investigate this issue.

谢谢.

推荐答案

这是 https://issues.apache.org/jira/browse/CASSANDRA-4687 或 https://issues.apache.org/jira/浏览/CASSANDRA-5202您可以在所有显示错误的服务器上运行命令nodetool invalidatekeycache".如果它不断回来，您可能需要禁用密钥缓存.如果是 5202，则只有在删除并重新创建使用相同名称的列族后才会发生.

This is either https://issues.apache.org/jira/browse/CASSANDRA-4687 or https://issues.apache.org/jira/browse/CASSANDRA-5202 You can run the command "nodetool invalidatekeycache" on all of the server showing the error. If it keeps coming back you may want to disable key cache. If it is 5202 it should only happen after dropping and recreating a column family using the same name.

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