cassandra drop keyspace hangs forever
<p>I try to drop a keyspace using cqlsh:</p>

<pre><code>drop keyspace test;
</code></pre>

<p>It then hangs indefinitely. When I finally interrupt it, I can no longer use cqlsh. For example, this hangs too:</p>

<pre><code>describe keyspaces;
</code></pre>

<p>I then have to restart cqlsh.
When describing the keyspace, I have this:</p>

<pre><code>cqlsh&gt; describe keyspace test;

CREATE KEYSPACE test WITH replication = {
  'class': 'SimpleStrategy',
  'replication_factor': '1'
};
Bad Request: unconfigured table schema_columnfamilies
</code></pre>

<p>In <code>/var/log/cassandra/system.log</code>, all I have is this:</p>

<pre><code>INFO  [Thrift:12] 2016-03-30 12:20:27,145 MigrationManager.java:448 - Drop Keyspace 'test'
</code></pre>

<p>I tried:</p>

<pre><code>❱❱❱ sstablescrub keyspace test                                            
WARN  10:27:00 Small commitlog volume detected at /var/lib/cassandra/commitlog; setting commitlog_total_space_in_mb to 2314.  You can override this in cassandra.yaml
WARN  10:27:00 Only 4248 MB free across all data volumes. Consider adding more capacity to your cluster or removing obsolete snapshots
ERROR 10:27:01 Exiting due to error while processing commit log during initialization.
org.apache.cassandra.io.FSWriteError: java.nio.file.AccessDeniedException: /var/lib/cassandra/commitlog/CommitLog-6-1459333621738.log
    at org.apache.cassandra.db.commitlog.CommitLogSegment.&lt;init&gt;(CommitLogSegment.java:149) ~[apache-cassandra-3.0.4.jar:3.0.4]
    at org.apache.cassandra.db.commitlog.MemoryMappedSegment.&lt;init&gt;(MemoryMappedSegment.java:47) ~[apache-cassandra-3.0.4.jar:3.0.4]
    at org.apache.cassandra.db.commitlog.CommitLogSegment.createSegment(CommitLogSegment.java:122) ~[apache-cassandra-3.0.4.jar:3.0.4]
    at org.apache.cassandra.db.commitlog.CommitLogSegmentManager$1.runMayThrow(CommitLogSegmentManager.java:121) ~[apache-cassandra-3.0.4.jar:3.0.4]
    at org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28) [apache-cassandra-3.0.4.jar:3.0.4]
    at java.lang.Thread.run(Thread.java:745) [na:1.8.0_73]
Caused by: java.nio.file.AccessDeniedException: /var/lib/cassandra/commitlog/CommitLog-6-1459333621738.log
    at sun.nio.fs.UnixException.translateToIOException(UnixException.java:84) ~[na:1.8.0_73]
    at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:102) ~[na:1.8.0_73]
    at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:107) ~[na:1.8.0_73]
    at sun.nio.fs.UnixFileSystemProvider.newFileChannel(UnixFileSystemProvider.java:177) ~[na:1.8.0_73]
    at java.nio.channels.FileChannel.open(FileChannel.java:287) ~[na:1.8.0_73]
    at java.nio.channels.FileChannel.open(FileChannel.java:335) ~[na:1.8.0_73]
    at org.apache.cassandra.db.commitlog.CommitLogSegment.&lt;init&gt;(CommitLogSegment.java:144) ~[apache-cassandra-3.0.4.jar:3.0.4]
    ... 5 common frames omitted
</code></pre>

<p>And also this:</p>

<pre><code>nodetool scrub test
</code></pre>

<p>And this:</p>

<pre><code>❱❱❱ nodetool repair test
[2016-03-30 12:28:44,970] Nothing to repair for keyspace 'test'
</code></pre>

<p>And this:</p>

<pre><code>❱❱❱ nodetool clearsnapshot
Requested clearing snapshot(s) for [all keyspaces]
</code></pre>

<p>But nothing seems to work.
Any idea how I could fix it ?</p>