ubuntu - 由于访问被拒绝异常，Cassandra 未启动

Question

尝试启动 Cassandra 时，我不断收到以下错误:

WARN  [MemtableFlushWriter:1] 2019-09-23 20:52:14,452 LogReplicaSet.java:220 - Failed to add record to a replica: java.nio.file.AccessDeniedException: /data/cassandra/data/system/local-7ad54392bcdd35a684174e047860b377/mc_txn_flush_05936940-de44-11e9-9dfb-251fcce05198.log ERROR [MemtableFlushWriter:1] 2019-09-23 20:52:14,457 ColumnFamilyStore.java:1183 - Flushing Memtable-local@1437882581(0.334KiB serialized bytes, 2 ops, 0%/0% of on/off-heap limit) failed with error java.lang.RuntimeException: java.nio.file.AccessDeniedException: /data/cassandra/data/system/local-7ad54392bcdd35a684174e047860b377/mc_txn_flush_05936940-de44-11e9-9dfb-251fcce05198.log

Answer 1

放弃物化 View 后，我遇到了同样的情况。寻找目录权限。您将看到该目录和 schema.cql将有 root所有权。

$ ls -la /data/cassandra/data/<keyspace>/<keyspace>-6d7291801cd811ea84aedd85165df9d2/snapshots/analyse-LFDBFUZCMGCMGKHFYAFW/
drwxr-xr-x 3 root      root             4096 Mar 26 19:58 .
drwxr-xr-x 4 cassandra cassandra      241664 Mar 27 03:11 ..
-rw-r--r-- 2 cassandra cassandra          92 Mar 26 13:46 md-7426-big-TOC.txt
-rw-r--r-- 2 cassandra cassandra        2435 Mar 26 14:29 md-7427-big-CompressionInfo.db
-rw-r--r-- 2 cassandra cassandra    12025128 Mar 26 14:29 md-7427-big-Data.db
-rw-r--r-- 2 cassandra cassandra          10 Mar 26 14:29 md-7427-big-Digest.crc32
-rw-r--r-- 2 cassandra cassandra       66056 Mar 26 14:29 md-7427-big-Filter.db
-rw-r--r-- 2 cassandra cassandra     1573654 Mar 26 14:29 md-7427-big-Index.db
-rw-r--r-- 2 cassandra cassandra       10869 Mar 26 14:29 md-7427-big-Statistics.db
-rw-r--r-- 2 cassandra cassandra       16568 Mar 26 14:29 md-7427-big-Summary.db
-rw-r--r-- 2 cassandra cassandra          92 Mar 26 14:29 md-7427-big-TOC.txt
-rw-r--r-- 1 root      root              962 Mar 26 19:58 schema.cql
...

您可以通过设置文件和文件夹所有者来修复 cassandra :

$ chown -R cassandra:cassandra /data/cassandra/data/<keyspace>/<keyspace>-6d7291801cd811ea84aedd85165df9d2/snapshots/analyse-LFDBFUZCMGCMGKHFYAFW/