tl; dr 我解决了升级到Cassandra 3.2的问题。 This bug显然导致了这个问题。
我正在运行版本为[cqlsh 5.0.1 | Cassandra 3.0.1 | CQL spec 3.3.1 | Native protocol v4]的Cassandra的双节点群集。
有一个我无法阅读的表，我有以下错误：
cqlsh:kepler> select type from md_data limit 1;
Traceback (most recent call last):
File "/local/chernals/dsc-cassandra-3.0.1/bin/cqlsh.py", line 1258, in perform_simple_statement
result = future.result()
File "/local/chernals/dsc-cassandra-3.0.1/bin/../lib/cassandra-driver-internal-only-3.0.0-6af642d.zip/cassandra-driver-3.0.0-6af642d/cassandra/cluster.py", line 3122, in result
raise self._final_exception
ReadFailure: code=1300 [Replica(s) failed to execute read] message="Operation failed - received 0 responses and 1 failures" info={'failures': 1, 'received_responses': 0, 'required_responses': 1, 'consistency': 'ONE'}
我可以毫无问题地阅读其他表格。
该表的架构是：
CREATE TABLE kepler.md_data (
name text,
tag text,
id timeuuid,
parameter frozen<parameter>,
blob_value blob,
real_value float,
telegram map<text, text> static,
text_value text,
type text,
PRIMARY KEY ((name, tag, id), parameter)
) WITH CLUSTERING ORDER BY (parameter ASC)
AND bloom_filter_fp_chance = 0.01
AND caching = {'keys': 'ALL', 'rows_per_partition': 'NONE'}
AND comment = ''
AND compaction = {'class': 'org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy', 'max_threshold': '32', 'min_threshold': '4'}
AND compression = {'chunk_length_in_kb': '64', 'class': 'org.apache.cassandra.io.compress.LZ4Compressor'}
AND crc_check_chance = 1.0
AND dclocal_read_repair_chance = 0.1
AND default_time_to_live = 0
AND gc_grace_seconds = 864000
AND max_index_interval = 2048
AND memtable_flush_period_in_ms = 0
AND min_index_interval = 128
AND read_repair_chance = 0.0
AND speculative_retry = '99PERCENTILE';
CREATE INDEX parameter_idx ON kepler.md_data (parameter);
这样的架构会出现一些问题吗？我正在运行不同版本的Cassandra / cqlsh吗？
请注意，当表为空时，我可以“读取”它（它是空的但是select语句成功）。
修改：
超级奇怪的问题，因为我很难再次复制它。我转移到只有一个节点的测试设置。它似乎与表中存在的行数相关联。
cqlsh:kepler> select type from md_data;
Traceback (most recent call last):
File "/local/chernals/dsc-cassandra-3.0.1/bin/cqlsh.py", line 1258, in perform_simple_statement
result = future.result()
File "/local/chernals/dsc-cassandra-3.0.1/bin/../lib/cassandra-driver-internal-only-3.0.0-6af642d.zip/cassandra-driver-3.0.0-6af642d/cassandra/cluster.py", line 3122, in result
raise self._final_exception
ReadFailure: code=1300 [Replica(s) failed to execute read] message="Operation failed - received 0 responses and 1 failures" info={'failures': 1, 'received_responses': 0, 'required_responses': 1, 'consistency': 'ONE'}
cqlsh:kepler> TRUNCATE TABLE md_data;
cqlsh:kepler> select type from md_data;
name | tag | id | parameter | blob_value | real_value | telegram | text_value | type
------+-----+----+-----------+------------+------------+----------+------------+------
(0 rows)
cqlsh:kepler>
编辑：来自cassandra -f
的错误消息WARN 11:07:00 Uncaught exception on thread Thread[SharedPool-Worker-3,5,main]: {}
java.lang.AssertionError: null
at org.apache.cassandra.db.columniterator.AbstractSSTableIterator$IndexState.updateBlock(AbstractSSTableIterator.java:463) ~[apache-cassandra-3.0.1.jar:3.0.1]
at org.apache.cassandra.db.columniterator.SSTableIterator$ForwardIndexedReader.computeNext(SSTableIterator.java:268) ~[apache-cassandra-3.0.1.jar:3.0.1]
at org.apache.cassandra.db.columniterator.SSTableIterator$ForwardReader.hasNextInternal(SSTableIterator.java:158) ~[apache-cassandra-3.0.1.jar:3.0.1]
at org.apache.cassandra.db.columniterator.AbstractSSTableIterator$Reader.hasNext(AbstractSSTableIterator.java:352) ~[apache-cassandra-3.0.1.jar:3.0.1]
at org.apache.cassandra.db.columniterator.AbstractSSTableIterator.hasNext(AbstractSSTableIterator.java:219) ~[apache-cassandra-3.0.1.jar:3.0.1]
at org.apache.cassandra.db.columniterator.SSTableIterator.hasNext(SSTableIterator.java:32) ~[apache-cassandra-3.0.1.jar:3.0.1]
at org.apache.cassandra.db.transform.BaseRows.hasNext(BaseRows.java:108) ~[apache-cassandra-3.0.1.jar:3.0.1]
at org.apache.cassandra.db.rows.UnfilteredRowIteratorSerializer.serialize(UnfilteredRowIteratorSerializer.java:131) ~[apache-cassandra-3.0.1.jar:3.0.1]
at org.apache.cassandra.db.rows.UnfilteredRowIteratorSerializer.serialize(UnfilteredRowIteratorSerializer.java:87) ~[apache-cassandra-3.0.1.jar:3.0.1]
at org.apache.cassandra.db.rows.UnfilteredRowIteratorSerializer.serialize(UnfilteredRowIteratorSerializer.java:77) ~[apache-cassandra-3.0.1.jar:3.0.1]
at org.apache.cassandra.db.partitions.UnfilteredPartitionIterators$Serializer.serialize(UnfilteredPartitionIterators.java:298) ~[apache-cassandra-3.0.1.jar:3.0.1]
at org.apache.cassandra.db.ReadResponse$LocalDataResponse.build(ReadResponse.java:136) ~[apache-cassandra-3.0.1.jar:3.0.1]
at org.apache.cassandra.db.ReadResponse$LocalDataResponse.<init>(ReadResponse.java:128) ~[apache-cassandra-3.0.1.jar:3.0.1]
at org.apache.cassandra.db.ReadResponse$LocalDataResponse.<init>(ReadResponse.java:123) ~[apache-cassandra-3.0.1.jar:3.0.1]
at org.apache.cassandra.db.ReadResponse.createDataResponse(ReadResponse.java:65) ~[apache-cassandra-3.0.1.jar:3.0.1]
at org.apache.cassandra.db.ReadCommand.createResponse(ReadCommand.java:289) ~[apache-cassandra-3.0.1.jar:3.0.1]
at org.apache.cassandra.service.StorageProxy$LocalReadRunnable.runMayThrow(StorageProxy.java:1721) ~[apache-cassandra-3.0.1.jar:3.0.1]
at org.apache.cassandra.service.StorageProxy$DroppableRunnable.run(StorageProxy.java:2375) ~[apache-cassandra-3.0.1.jar:3.0.1]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[na:1.8.0_66]
at org.apache.cassandra.concurrent.AbstractTracingAwareExecutorService$FutureTask.run(AbstractTracingAwareExecutorService.java:164) ~[apache-cassandra-3.0.1.jar:3.0.1]
at org.apache.cassandra.concurrent.AbstractTracingAwareExecutorService$TraceSessionFutureTask.run(AbstractTracingAwareExecutorService.java:136) [apache-cassandra-3.0.1.jar:3.0.1]
at org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:105) [apache-cassandra-3.0.1.jar:3.0.1]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_66]