Vấn đề liên kết JNA trong khi bắt đầu cassandra RHEL 6.5

Question

Tôi đang cố cài đặt cassandra trong máy chủ RHEL 6.5 của mình. Khi tôi bắt đầu cassandara, tôi nhận được một L ERI liên quan đến JNA. Ngoại lệ nói rằng không tìm thấy lớp học. Tuy nhiên, tôi thấy trong nhật ký rằng bình jna được thêm vào đường dẫn lớp. Tôi đã thử sử dụng cả apache-cassandra-3.0.0 và apache-cassandra-2.2.3, tôi nhận được cùng một ngoại lệ trong cả hai. Tôi thấy rằng bình jna có sẵn trong $ CASSANDRA_HOME/lib và cũng có trong/usr/share/java. Phiên bản jna jar được cài đặt là 4.0.0. Bất kỳ trợ giúp được đánh giá cao. Sau đây là các bản ghi khởi động -

INFO 05:57:57 Classpath: /home/cassandra-new/apache-cassandra-2.2.3/conf:/home/cassandra-new/apache-cassandra-2.2.3/build/classes/main:/home/cassandra-new/apache-cassandra-2.2.3/build/classes/thrift:/home/cassandra-new/apache-cassandra-2.2.3/lib/airline-0.6.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/antlr-runtime-3.5.2.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/apache-cassandra-2.2.3.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/apache-cassandra-clientutil-2.2.3.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/apache-cassandra-thrift-2.2.3.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/cassandra-driver-core-2.2.0-rc2-SNAPSHOT-20150617-shaded.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/commons-cli-1.1.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/commons-codec-1.2.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/commons-lang3-3.1.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/commons-math3-3.2.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/compress-lzf-0.8.4.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/concurrentlinkedhashmap-lru-1.4.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/crc32ex-0.1.1.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/disruptor-3.0.1.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/ecj-4.4.2.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/guava-16.0.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/high-scale-lib-1.0.6.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/jackson-core-asl-1.9.2.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/jackson-mapper-asl-1.9.2.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/jamm-0.3.0.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/javax.inject.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/jbcrypt-0.3m.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/jcl-over-slf4j-1.7.7.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/jna-4.0.0.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/joda-time-2.4.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/json-simple-1.1.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/libthrift-0.9.2.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/log4j-over-slf4j-1.7.7.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/logback-classic-1.1.3.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/logback-core-1.1.3.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/lz4-1.3.0.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/metrics-core-3.1.0.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/metrics-logback-3.1.0.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/netty-all-4.0.23.Final.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/ohc-core-0.3.4.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/ohc-core-j8-0.3.4.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/reporter-config3-3.0.0.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/reporter-config-base-3.0.0.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/sigar-1.6.4.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/slf4j-api-1.7.7.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/snakeyaml-1.11.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/snappy-java-1.1.1.7.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/ST4-4.0.8.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/stream-2.5.2.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/super-csv-2.1.0.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/thrift-server-0.3.7.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/jsr223//.jar:/home/cassandra-new/apache-cassandra-2.2.3/lib/jamm-0.3.0.jar WARN 05:57:57 JNA link failure, one or more native method will be unavailable. WARN 05:57:57 JMX is not enabled to receive remote connections. Please see cassandra-env.sh for more info. INFO 05:57:57 Initializing SIGAR library WARN 05:57:57 Cassandra server running in degraded mode. Is swap disabled? : false, Address space adequate? : true, nofile limit adequate? : false, nproc limit adequate? : true INFO 05:57:58 Initializing system.sstable_activity INFO 05:57:58 Initializing system.hints INFO 05:57:58 Initializing system.compaction_history INFO 05:57:58 Initializing system.peers INFO 05:57:58 Initializing system.schema_columnfamilies INFO 05:57:59 Initializing system.schema_functions INFO 05:57:59 Initializing system.IndexInfo INFO 05:57:59 Initializing system.schema_columns INFO 05:57:59 Initializing system.schema_triggers INFO 05:57:59 Initializing system.local INFO 05:57:59 Initializing system.schema_usertypes INFO 05:57:59 Initializing system.batchlog INFO 05:57:59 Initializing system.available_ranges INFO 05:57:59 Initializing system.schema_aggregates INFO 05:57:59 Initializing system.paxos INFO 05:57:59 Initializing system.peer_events INFO 05:57:59 Initializing system.size_estimates INFO 05:57:59 Initializing system.compactions_in_progress INFO 05:57:59 Initializing system.schema_keyspaces INFO 05:57:59 Initializing system.range_xfers ERROR 05:57:59 Exception in thread Thread[MemtableFlushWriter:1,5,main] java.lang.NoClassDefFoundError: Could not initialize class com.sun.jna.Native at org.apache.cassandra.utils.memory.MemoryUtil.allocate(MemoryUtil.java:82) ~[apache-cassandra-2.2.3.jar:2.2.3] at org.apache.cassandra.io.util.Memory.(Memory.java:74) ~[apache-cassandra-2.2.3.jar:2.2.3] at org.apache.cassandra.io.util.SafeMemory.(SafeMemory.java:32) ~[apache-cassandra-2.2.3.jar:2.2.3] at org.apache.cassandra.io.compress.CompressionMetadata$Writer.(CompressionMetadata.java:274) ~[apache-cassandra-2.2.3.jar:2.2.3] at org.apache.cassandra.io.compress.CompressionMetadata$Writer.open(CompressionMetadata.java:288) ~[apache-cassandra-2.2.3.jar:2.2.3] at org.apache.cassandra.io.compress.CompressedSequentialWriter.(CompressedSequentialWriter.java:73) ~[apache-cassandra-2.2.3.jar:2.2.3] at org.apache.cassandra.io.util.SequentialWriter.open(SequentialWriter.java:168) ~[apache-cassandra-2.2.3.jar:2.2.3] at org.apache.cassandra.io.sstable.format.big.BigTableWriter.(BigTableWriter.java:75) ~[apache-cassandra-2.2.3.jar:2.2.3] at org.apache.cassandra.io.sstable.format.big.BigFormat$WriterFactory.open(BigFormat.java:107) ~[apache-cassandra-2.2.3.jar:2.2.3] at org.apache.cassandra.io.sstable.format.SSTableWriter.create(SSTableWriter.java:84) ~[apache-cassandra-2.2.3.jar:2.2.3] at org.apache.cassandra.db.Memtable$FlushRunnable.createFlushWriter(Memtable.java:424) ~[apache-cassandra-2.2.3.jar:2.2.3] at org.apache.cassandra.db.Memtable$FlushRunnable.writeSortedContents(Memtable.java:367) ~[apache-cassandra-2.2.3.jar:2.2.3] at org.apache.cassandra.db.Memtable$FlushRunnable.runMayThrow(Memtable.java:352) ~[apache-cassandra-2.2.3.jar:2.2.3] at org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28) ~[apache-cassandra-2.2.3.jar:2.2.3] at com.google.common.util.concurrent.MoreExecutors$SameThreadExecutorService.execute(MoreExecutors.java:297) ~[guava-16.0.jar:na] at org.apache.cassandra.db.ColumnFamilyStore$Flush.run(ColumnFamilyStore.java:1134) ~[apache-cassandra-2.2.3.jar:2.2.3] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) ~[na:1.8.0_65] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) ~[na:1.8.0_65] at java.lang.Thread.run(Thread.java:745) ~[na:1.8.0_65]

Answer 1

tôi đã đi qua mã trong CLibrary.java và thấy sau mã nơi ngoại lệ được bắt -

catch (UnsatisfiedLinkError e) 
{ 
    logger.warn("JNA link failure, one or more native method will be unavailable."); 
    logger.trace("JNA link failure details: {}", e.getMessage()); 
} 

tôi khởi động lại cassandra bằng cách thay đổi các bản ghi cấp trong conf/logback.xml để TRACE, để in chi tiết bổ sung đó -

<logger name="org.apache.cassandra" level="TRACE"/> 

Bây giờ tôi có thể thấy vấn đề thực tế -

/tmp/jna-3506402/jna6068045839690239595.tmp: thất bại trong việc lập bản đồ phân đoạn từ đối tượng chia sẻ: Hoạt động không được phép

Vấn đề này được gây ra do cờ noexec vào thư mục/tmp.

Sau đó tôi quyết định thay đổi thư mục tmp bằng cách thay đổi tmpdir bằng cách sử dụng tùy chọn:
-Djava.io.tmpdir=/home/cassandra/tmp Điều đó đã khắc phục được sự cố.

Tôi đã thêm các tùy chọn trong tệp cassandra-env.sh. Đã thêm tuyên bố sau -

JVM_OPTS="$JVM_OPTS -Djava.io.tmpdir=/home/cassandra/tmp"