我在mac上使用brew安装了Cassandra，它工作正常几天。但现在它开始抛出错误而不改变yaml文件中的任何内容。
Connection error: ('Unable to connect to any servers', {'127.0.0.1': error(61, "Tried connecting to [('127.0.0.1', 9042)]. Last error: Connection refused")})
所以我尝试使用brew更新Cassandra到3.11。现在，在启动Cassandra时，我收到了这个错误。
ERROR [main] 2017-09-20 12:52:02,732 JVMStabilityInspector.java:82 - Exiting due to error while processing commit log during initialization.
org.apache.cassandra.db.commitlog.CommitLogReadHandler$CommitLogReadException: Encountered bad header at position 157007 of commit log /usr/local/var/lib/cassandra/commitlog/CommitLog-6-1505888222471.log, with bad position but valid CRC
at org.apache.cassandra.db.commitlog.CommitLogSegmentReader$SegmentIterator.computeNext(CommitLogSegmentReader.java:113) [apache-cassandra-3.11.0.jar:3.11.0]
at org.apache.cassandra.db.commitlog.CommitLogSegmentReader$SegmentIterator.computeNext(CommitLogSegmentReader.java:84) [apache-cassandra-3.11.0.jar:3.11.0]
at com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:143) [guava-18.0.jar:na]
at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:138) [guava-18.0.jar:na]
at org.apache.cassandra.db.commitlog.CommitLogReader.readCommitLogSegment(CommitLogReader.java:190) [apache-cassandra-3.11.0.jar:3.11.0]
at org.apache.cassandra.db.commitlog.CommitLogReader.readAllFiles(CommitLogReader.java:84) [apache-cassandra-3.11.0.jar:3.11.0]
at org.apache.cassandra.db.commitlog.CommitLogReplayer.replayFiles(CommitLogReplayer.java:140) [apache-cassandra-3.11.0.jar:3.11.0]
at org.apache.cassandra.db.commitlog.CommitLog.recoverFiles(CommitLog.java:177) [apache-cassandra-3.11.0.jar:3.11.0]
at org.apache.cassandra.db.commitlog.CommitLog.recoverSegmentsOnDisk(CommitLog.java:158) [apache-cassandra-3.11.0.jar:3.11.0]
at org.apache.cassandra.service.CassandraDaemon.setup(CassandraDaemon.java:325) [apache-cassandra-3.11.0.jar:3.11.0]
at org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon.java:600) [apache-cassandra-3.11.0.jar:3.11.0]
at org.apache.cassandra.service.CassandraDaemon.main(CassandraDaemon.java:689) [apache-cassandra-3.11.0.jar:3.11.0]
从这个链接Cassandra: Exiting due to error while processing commit log during initialization我得到了一些关于节点工具修复的信息。但即使节点工具修复也无法正常工作。
objc[15089]: Class JavaLaunchHelper is implemented in both /Library/Java/JavaVirtualMachines/jdk1.8.0_111.jdk/Contents/Home/bin/java (0x10934b4c0) and /Library/Java/JavaVirtualMachines/jdk1.8.0_111.jdk/Contents/Home/jre/lib/libinstrument.dylib (0x10abba4e0). One of the two will be used. Which one is undefined.
nodetool: Failed to connect to '127.0.0.1:7199' - ConnectException: 'Connection refused (Connection refused)'.
commit log /usr/local/var/lib/cassandra/commitlog/CommitLog-6-1505888222471.log
听起来你的提交日志文件之一已损坏。删除该文件，然后重新启动。
“但即使是节点工具修复也无法正常工作。”
我不担心。如果您在单个节点群集上（例如：您自己的Mac），则修复没有任何其他节点来传输数据，因此它无论如何都无法工作。