CommitLogSync 异常
CommitLogSync exception
我已经在 3 台 RHEL 服务器上安装了 cassandra。我配置了 2 个数据中心。
YAML 文件如下所示：
cluster_name: 'Cluster1'
num_tokens: 256
分区器：org.apache.cassandra.dht.Murmur3Partitioner
data_file_directories:- /home/cass/share/cassandra/data
commitlog_directory: /home/cass/share/cassandra/commitlog
saved_caches_directory: /home/cass/share/cassandra/saved_caches
seed_provider:
- class_name: org.apache.cassandra.locator.SimpleSeedProvider
参数：
- 种子：“172.16.129.140”
listen_address: 'IP address of the node'
endpoint_snitch: GossipingPropertyFileSnitch
我遇到以下异常：
启动期间遇到异常 (org.apache.cassandra.exceptions.ConfigurationException)：缺少必需的指令 CommitLogSync
缺少必需的指令 CommitLogSync
错误05:55:21启动期间遇到异常：缺少必需的指令 CommitLogSync
这里到底出了什么问题？
您的 cassandra.yaml 是发货版本的修改版吗？即使是默认值也需要在那里。
快速浏览一下您的代码片段 - commitlog 目录是否真的存在？
commitlog_directory: /home/cass/ share/cassandra/commitlog
里面有一个space，也许这只是一个简单的错字。来自文档：
commitlog_sync
(Default: periodic) The method that Cassandra uses to
acknowledge writes in milliseconds:
periodic: (Default: 10000
milliseconds [10 seconds]) With commitlog_sync_period_in_ms, controls
how often the commit log is synchronized to disk. Periodic syncs are
acknowledged immediately.
batch: (Default: disabled)note With commitlog_sync_batch_window_in_ms
(Default: 2 ms), controls how long Cassandra waits for other writes
before performing a sync. When this method is enabled, Cassandra does
not acknowledge writes until they are fsynced to disk.
https://docs.datastax.com/en/cassandra/3.0/cassandra/configuration/configCassandra_yaml.html
为了安全地设置默认值和所有参数，我总是建议使用出厂的 cassandra.yaml 并且只修改需要其他值的设置。这也使得升级时更容易 - diff 是你的朋友 - 不要错过新参数。
我已经在 3 台 RHEL 服务器上安装了 cassandra。我配置了 2 个数据中心。 YAML 文件如下所示：
cluster_name: 'Cluster1'
num_tokens: 256
分区器：org.apache.cassandra.dht.Murmur3Partitioner
data_file_directories:- /home/cass/share/cassandra/data
commitlog_directory: /home/cass/share/cassandra/commitlog
saved_caches_directory: /home/cass/share/cassandra/saved_caches
seed_provider: - class_name: org.apache.cassandra.locator.SimpleSeedProvider 参数： - 种子：“172.16.129.140” listen_address: 'IP address of the node'
endpoint_snitch: GossipingPropertyFileSnitch
我遇到以下异常： 启动期间遇到异常 (org.apache.cassandra.exceptions.ConfigurationException)：缺少必需的指令 CommitLogSync
缺少必需的指令 CommitLogSync
错误05:55:21启动期间遇到异常：缺少必需的指令 CommitLogSync
这里到底出了什么问题？
您的 cassandra.yaml 是发货版本的修改版吗？即使是默认值也需要在那里。
快速浏览一下您的代码片段 - commitlog 目录是否真的存在？
commitlog_directory: /home/cass/ share/cassandra/commitlog
里面有一个space，也许这只是一个简单的错字。来自文档：
commitlog_sync
(Default: periodic) The method that Cassandra uses to acknowledge writes in milliseconds:
periodic: (Default: 10000 milliseconds [10 seconds]) With commitlog_sync_period_in_ms, controls how often the commit log is synchronized to disk. Periodic syncs are acknowledged immediately.
batch: (Default: disabled)note With commitlog_sync_batch_window_in_ms (Default: 2 ms), controls how long Cassandra waits for other writes before performing a sync. When this method is enabled, Cassandra does not acknowledge writes until they are fsynced to disk.
https://docs.datastax.com/en/cassandra/3.0/cassandra/configuration/configCassandra_yaml.html
为了安全地设置默认值和所有参数，我总是建议使用出厂的 cassandra.yaml 并且只修改需要其他值的设置。这也使得升级时更容易 - diff 是你的朋友 - 不要错过新参数。