title: Cassandra Installation
body: <pre><code>ERROR [MemtableFlushWriter:1] 2019-11-05 19:23:08,691 LogReplicaSet.java:94 - Failed to create log replica C:\apache-cassandra-3.11.5\data\data\system\local-7ad54392bcdd35a684174e047860b377/C:\apache-cassandra-3.11.5\data\data\system\local-7ad54392bcdd35a684174e047860b377\md_txn_flush_99189c20-ffd3-11e9-b69e-0752c2cde782.log
  org.apache.cassandra.io.FSReadError: java.io.IOException: Invalid folder descriptor trying to create log replica C:\apache-cassandra-3.11.5\data\data\system\local-7ad54392bcdd35a684174e047860b377
          at org.apache.cassandra.db.lifecycle.LogReplica.create(LogReplica.java:58) ~[apache-cassandra-3.11.5.jar:3.11.5]
          at org.apache.cassandra.db.lifecycle.LogReplicaSet.maybeCreateReplica(LogReplicaSet.java:86) ~[apache-cassandra-3.11.5.jar:3.11.5]
          at org.apache.cassandra.db.lifecycle.LogFile.makeRecord(LogFile.java:311) [apache-cassandra-3.11.5.jar:3.11.5]
          at org.apache.cassandra.db.lifecycle.LogFile.add(LogFile.java:283) [apache-cassandra-3.11.5.jar:3.11.5]
          at org.apache.cassandra.db.lifecycle.LogTransaction.trackNew(LogTransaction.java:139) [apache-cassandra-3.11.5.jar:3.11.5]
          at org.apache.cassandra.db.lifecycle.LifecycleTransaction.trackNew(LifecycleTransaction.java:528) [apache-cassandra-3.11.5.jar:3.11.5]
          at org.apache.cassandra.io.sstable.format.big.BigTableWriter.&lt;init&gt;(BigTableWriter.java:81) [apache-cassandra-3.11.5.jar:3.11.5]
          at org.apache.cassandra.io.sstable.format.big.BigFormat$WriterFactory.open(BigFormat.java:92) [apache-cassandra-3.11.5.jar:3.11.5]
          at org.apache.cassandra.io.sstable.format.SSTableWriter.create(SSTableWriter.java:102) [apache-cassandra-3.11.5.jar:3.11.5]
          at org.apache.cassandra.io.sstable.SimpleSSTableMultiWriter.create(SimpleSSTableMultiWriter.java:119) [apache-cassandra-3.11.5.jar:3.11.5]
          at org.apache.cassandra.db.compaction.AbstractCompactionStrategy.createSSTableMultiWriter(AbstractCompactionStrategy.java:588) [apache-cassandra-3.11.5.jar:3.11.5]
          at org.apache.cassandra.db.compaction.CompactionStrategyManager.createSSTableMultiWriter(CompactionStrategyManager.java:1027) [apache-cassandra-3.11.5.jar:3.11.5]
          at org.apache.cassandra.db.ColumnFamilyStore.createSSTableMultiWriter(ColumnFamilyStore.java:532) [apache-cassandra-3.11.5.jar:3.11.5]
          at org.apache.cassandra.db.Memtable$FlushRunnable.createFlushWriter(Memtable.java:504) [apache-cassandra-3.11.5.jar:3.11.5]
          at org.apache.cassandra.db.Memtable$FlushRunnable.&lt;init&gt;(Memtable.java:443) [apache-cassandra-3.11.5.jar:3.11.5]
          at org.apache.cassandra.db.Memtable$FlushRunnable.&lt;init&gt;(Memtable.java:420) [apache-cassandra-3.11.5.jar:3.11.5]
          at org.apache.cassandra.db.Memtable.createFlushRunnables(Memtable.java:307) [apache-cassandra-3.11.5.jar:3.11.5]
          at org.apache.cassandra.db.Memtable.flushRunnables(Memtable.java:298) [apache-cassandra-3.11.5.jar:3.11.5]
          at org.apache.cassandra.db.ColumnFamilyStore$Flush.flushMemtable(ColumnFamilyStore.java:1153) [apache-cassandra-3.11.5.jar:3.11.5]
          at org.apache.cassandra.db.ColumnFamilyStore$Flush.run(ColumnFamilyStore.java:1118) [apache-cassandra-3.11.5.jar:3.11.5]
          at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_191]
          at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_191]
          at org.apache.cassandra.concurrent.NamedThreadFactory.lambda$threadLocalDeallocator$0(NamedThreadFactory.java:84) [apache-cassandra-3.11.5.jar:3.11.5]
          at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_191]
  Caused by: java.io.IOException: Invalid folder descriptor trying to create log replica C:\apache-cassandra-3.11.5\data\data\system\local-7ad54392bcdd35a684174e047860b377
          ... 24 common frames omitted
  </code></pre>