Errore di avvio del server di Cassandra su OS X

Question

Sto tentando di installare apache cassandra sul mio MacBook OS X. Sto provando a testare i database NoSql, ho già impostato memcached e redis. Ma con cassandra sto avendo Sto usando jdk 1.7.0_09 da Oracle Ho seguito le istruzioni di installazione, ma quando sto provando ad avviare il server, ottengo questo il problema dalla console:

 

MacBook-Air-Urij:bin urijvoskresenskij$ ./cassandra -f 
xss = -ea -javaagent:./../lib/jamm-0.2.5.jar -XX:+UseThreadPriorities -XX:ThreadPriorityPolicy=42 -Xms1024M -Xmx1024M -Xmn200M -XX:+HeapDumpOnOutOfMemoryError 
log4j:ERROR setFile(null,true) call failed. 
java.io.FileNotFoundException: /var/log/cassandra/system.log (Permission denied) 
    at java.io.FileOutputStream.open(Native Method) 
    at java.io.FileOutputStream.<init>(FileOutputStream.java:212) 
    at java.io.FileOutputStream.<init>(FileOutputStream.java:136) 
    at org.apache.log4j.FileAppender.setFile(FileAppender.java:294) 
    at org.apache.log4j.RollingFileAppender.setFile(RollingFileAppender.java:207) 
    at org.apache.log4j.FileAppender.activateOptions(FileAppender.java:165) 
    at org.apache.log4j.config.PropertySetter.activate(PropertySetter.java:307) 
    at org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java:172) 
    at org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java:104) 
    at org.apache.log4j.PropertyConfigurator.parseAppender(PropertyConfigurator.java:809) 
    at org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigurator.java:735) 
    at org.apache.log4j.PropertyConfigurator.configureRootCategory(PropertyConfigurator.java:615) 
    at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:502) 
    at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:395) 
    at org.apache.log4j.PropertyWatchdog.doOnChange(PropertyConfigurator.java:922) 
    at org.apache.log4j.helpers.FileWatchdog.checkAndConfigure(FileWatchdog.java:89) 
    at org.apache.log4j.helpers.FileWatchdog.<init>(FileWatchdog.java:58) 
    at org.apache.log4j.PropertyWatchdog.<init>(PropertyConfigurator.java:914) 
    at org.apache.log4j.PropertyConfigurator.configureAndWatch(PropertyConfigurator.java:461) 
    at org.apache.cassandra.service.AbstractCassandraDaemon.initLog4j(AbstractCassandraDaemon.java:100) 
    at org.apache.cassandra.thrift.CassandraDaemon.<clinit>(CassandraDaemon.java:61) 
INFO 17:40:17,717 Logging initialized 
INFO 17:40:17,720 JVM vendor/version: Java HotSpot(TM) 64-Bit Server VM/1.7.0_09 
INFO 17:40:17,720 Heap size: 1052770304/1052770304 
INFO 17:40:17,721 Classpath: ./../conf:./../build/classes/main:./../build/classes/thrift:./../lib/antlr-3.2.jar:./../lib/apache-cassandra-1.1.7.jar:./../lib/apache-cassandra-clientutil-1.1.7.jar:./../lib/apache-cassandra-thrift-1.1.7.jar:./../lib/avro-1.4.0-fixes.jar:./../lib/avro-1.4.0-sources-fixes.jar:./../lib/commons-cli-1.1.jar:./../lib/commons-codec-1.2.jar:./../lib/commons-lang-2.4.jar:./../lib/compress-lzf-0.8.4.jar:./../lib/concurrentlinkedhashmap-lru-1.3.jar:./../lib/guava-r08.jar:./../lib/high-scale-lib-1.1.2.jar:./../lib/jackson-core-asl-1.9.2.jar:./../lib/jackson-mapper-asl-1.9.2.jar:./../lib/jamm-0.2.5.jar:./../lib/jline-0.9.94.jar:./../lib/json-simple-1.1.jar:./../lib/libthrift-0.7.0.jar:./../lib/log4j-1.2.16.jar:./../lib/metrics-core-2.0.3.jar:./../lib/servlet-api-2.5-20081211.jar:./../lib/slf4j-api-1.6.1.jar:./../lib/slf4j-log4j12-1.6.1.jar:./../lib/snakeyaml-1.6.jar:./../lib/snappy-java-1.0.4.1.jar:./../lib/snaptree-0.1.jar:./../lib/jamm-0.2.5.jar 
INFO 17:40:17,722 JNA not found. Native methods will be disabled. 
INFO 17:40:17,734 Loading settings from file:/Users/urijvoskresenskij/apache-cassandra-1.1.7/conf/cassandra.yaml 
INFO 17:40:17,924 DiskAccessMode 'auto' determined to be mmap, indexAccessMode is mmap 
INFO 17:40:18,149 Global memtable threshold is enabled at 334MB 
java.lang.reflect.InvocationTargetException 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:601) 
    at org.xerial.snappy.SnappyLoader.loadNativeLibrary(SnappyLoader.java:317) 
    at org.xerial.snappy.SnappyLoader.load(SnappyLoader.java:219) 
    at org.xerial.snappy.Snappy.<clinit>(Snappy.java:44) 
    at org.apache.cassandra.io.compress.SnappyCompressor.create(SnappyCompressor.java:46) 
    at org.apache.cassandra.io.compress.SnappyCompressor.isAvailable(SnappyCompressor.java:56) 
    at org.apache.cassandra.io.compress.SnappyCompressor.<clinit>(SnappyCompressor.java:38) 
    at org.apache.cassandra.config.CFMetaData.<clinit>(CFMetaData.java:76) 
    at org.apache.cassandra.config.KSMetaData.systemKeyspace(KSMetaData.java:84) 
    at org.apache.cassandra.config.DatabaseDescriptor.loadYaml(DatabaseDescriptor.java:438) 
    at org.apache.cassandra.config.DatabaseDescriptor.<clinit>(DatabaseDescriptor.java:114) 
    at org.apache.cassandra.service.AbstractCassandraDaemon.setup(AbstractCassandraDaemon.java:127) 
    at org.apache.cassandra.service.AbstractCassandraDaemon.activate(AbstractCassandraDaemon.java:389) 
    at org.apache.cassandra.thrift.CassandraDaemon.main(CassandraDaemon.java:106) 
Caused by: java.lang.UnsatisfiedLinkError: no snappyjava in java.library.path 
    at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1860) 
    at java.lang.Runtime.loadLibrary0(Runtime.java:845) 
    at java.lang.System.loadLibrary(System.java:1084) 
    at org.xerial.snappy.SnappyNativeLoader.loadLibrary(SnappyNativeLoader.java:52) 
    ... 17 more 
WARN 17:40:18,269 Cannot initialize native Snappy library. Compression on new tables will be disabled. 
ERROR 17:40:18,317 Exception encountered during startup 
java.lang.AssertionError: Directory /var/lib/cassandra/data is not accessible. 
    at org.apache.cassandra.service.AbstractCassandraDaemon.setup(AbstractCassandraDaemon.java:155) 
    at org.apache.cassandra.service.AbstractCassandraDaemon.activate(AbstractCassandraDaemon.java:389) 
    at org.apache.cassandra.thrift.CassandraDaemon.main(CassandraDaemon.java:106) 
java.lang.AssertionError: Directory /var/lib/cassandra/data is not accessible. 
    at org.apache.cassandra.service.AbstractCassandraDaemon.setup(AbstractCassandraDaemon.java:155) 
    at org.apache.cassandra.service.AbstractCassandraDaemon.activate(AbstractCassandraDaemon.java:389) 
    at org.apache.cassandra.thrift.CassandraDaemon.main(CassandraDaemon.java:106) 
Exception encountered during startup: Directory /var/lib/cassandra/data is not accessible. 
</pre></code> 

Non so come risolvere il problema. Per favore, aiutami, ragazzi :)

Answer 1

Non si dispone dell'autorizzazione per scrivere in/var/log, che è normale. Dovrai eseguire Cassandra come sudo o creare tu stesso la directory con le autorizzazioni appropriate.

Answer 2

config/cassandra.yaml - contiene i percorsi per tutte le cartelle richieste da Cassandra. Cambia quei percorsi per posizionare dove l'utente ha accesso in scrittura in modo che non sia necessario eseguirlo come sudo.

Answer 3

Penso che una soluzione potenzialmente meno intrusiva per lavorare su macchine di sviluppo locale non sia un problema con i permessi di root. È sufficiente modificare le posizioni dei registri ovunque si desideri modificando il file delle proprietà log4j nella directory <cassandra_install_dir>/conf.