尝试使用Java驱动程序连接到Cassandra时出现AuthenticationException
我试图编写一个Java代码段，在一个单独的线程中启动Cassandra，然后使用驱动程序进行连接并创建几个用户。我们有一个使用基于Python的CQLSH客户端的脚本，但是当我们将一台服务器升级到Ubuntu 16.04时遇到了问题。显然，RHEL 7上的Ubuntu与Python版本不兼容，但Ubuntu 16.04不兼容。我甚至尝试在Ubuntu上降级Python版本，但仍然无法使用CQLSH客户端，所以我求助于Java。这些是Maven依赖项。请注意，我曾尝试使用默认的Guava版本16.0，但遇到了一些其他问题，因此我用17.0取代了它尝试使用Java驱动程序连接到Cassandra时出现AuthenticationException,cassandra,Cassandra,我试图编写一个Java代码段，在一个单独的线程中启动Cassandra，然后使用驱动程序进行连接并创建几个用户。我们有一个使用基于Python的CQLSH客户端的脚本，但是当我们将一台服务器升级到Ubuntu 16.04时遇到了问题。显然，RHEL 7上的Ubuntu与Python版本不兼容，但Ubuntu 16.04不兼容。我甚至尝试在Ubuntu上降级Python版本，但仍然无法使用CQLSH客户端，所以我求助于Java。这些是Maven依赖项。请注意，我曾尝试使用默认的Guava版本16.
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System.setProperty("cassandra.config", "file:" + file.getAbsolutePath()); // Path to cassandra.yaml
System.setProperty("cassandra-foreground", "true");
System.setProperty("cassandra.native.epoll.enabled", "false");
...
cassandraDaemon = new CassandraDaemon();
cassandraDaemon.activate();
Cluster cluster = new Cluster.Builder().addContactPoints("localhost").withPort(9042).withCredentials("cassandra", "cassandra").build();
Session session = cluster.connect("system_auth");
System.setProperty("cassandra.config", "file:" + file.getAbsolutePath()); // Path to cassandra.yaml
System.setProperty("cassandra-foreground", "true");
System.setProperty("cassandra.native.epoll.enabled", "false");
...
cassandraDaemon = new CassandraDaemon();
cassandraDaemon.activate();
Cluster cluster = new Cluster.Builder().addContactPoints("localhost").withPort(9042).withCredentials("cassandra", "cassandra").build();
Session session = cluster.connect("system_auth");
com.datastax.driver.core.exceptions.AuthenticationException: Authentication error on host localhost/127.0.0.1:9042: Username and/or password are incorrect
at com.datastax.driver.core.Connection$8.apply(Connection.java:393)
at com.datastax.driver.core.Connection$8.apply(Connection.java:362)
cluster_name: 'Test Cluster'
num_tokens: 256
hinted_handoff_enabled: true
hinted_handoff_throttle_in_kb: 1024
max_hints_delivery_threads: 2
batchlog_replay_throttle_in_kb: 1024
authenticator: PasswordAuthenticator
authorizer: CassandraAuthorizer
role_manager: CassandraRoleManager
roles_validity_in_ms: 2000
permissions_validity_in_ms: 2000
partitioner: org.apache.cassandra.dht.Murmur3Partitioner
disk_failure_policy: stop
commit_failure_policy: stop
key_cache_size_in_mb:
key_cache_save_period: 14400
row_cache_size_in_mb: 0
row_cache_save_period: 0
counter_cache_size_in_mb:
counter_cache_save_period: 7200
commitlog_sync: periodic
commitlog_sync_period_in_ms: 10000
commitlog_segment_size_in_mb: 32
seed_provider:
- class_name: org.apache.cassandra.locator.SimpleSeedProvider
parameters:
- seeds: "127.0.0.1"
concurrent_reads: 32
concurrent_writes: 32
concurrent_counter_writes: 32
memtable_allocation_type: heap_buffers
index_summary_capacity_in_mb:
index_summary_resize_interval_in_minutes: 60
trickle_fsync: false
trickle_fsync_interval_in_kb: 10240
storage_port: 7000
ssl_storage_port: 7001
listen_address: localhost
start_native_transport: true
native_transport_port: 9042
start_rpc: false
rpc_address: localhost
rpc_port: 9160
rpc_keepalive: true
rpc_server_type: sync
thrift_framed_transport_size_in_mb: 15
incremental_backups: false
snapshot_before_compaction: false
auto_snapshot: true
tombstone_warn_threshold: 1000
tombstone_failure_threshold: 100000
column_index_size_in_kb: 64
batch_size_warn_threshold_in_kb: 5
batch_size_fail_threshold_in_kb: 50
compaction_throughput_mb_per_sec: 16
compaction_large_partition_warning_threshold_mb: 100
sstable_preemptive_open_interval_in_mb: 50
任何关于我可能做错了什么的提示都将不胜感激 我想这是一种比赛条件。客户端尝试连接时，服务器尚未完全初始化。我放了一根线；在尝试连接之前在代码中输入，这是有效的。是否有更好的方法验证服务器是否已完全初始化 我想这是一种比赛条件。客户端尝试连接时，服务器尚未完全初始化。我放了一根线；在尝试连接之前在代码中输入，这是有效的。是否有更好的方法验证服务器是否已完全初始化 我不确定这是否有帮助，但如果您在创建Cassandrademon之前添加以下内容，cassandra用户可能不会立即出现： System.setPropertycassandra.superuser\u setup\u delay\u ms，0；
这可能会解决您的问题。默认值为10000 10秒，这解释了为什么睡眠20秒可能会解决您的问题。我不确定这是否有帮助，但如果您在创建Cassandrademon之前添加以下内容，cassandra用户可能不会立即出现： System.setPropertycassandra.superuser\u setup\u delay\u ms，0；
这可能会解决您的问题。该值默认为10000 10秒，这解释了为什么睡眠20秒可能会解决您的问题。这可能对您没有帮助，但对于DSE，JMX中有一个com.datasax.bdp:type=core，name=DseDaemon startupped操作，但这需要点击JMX和DSE这可能对您没有帮助，但对于DSE，JMX中有一个com.datasax.bdp:type=core，name=DseDaemon StartupFinished操作，但这需要点击JMX和DSE