Cassandra tmpdir 更改位置

/tmp如果設置為，則 Cassandra 無法啟動noexec，這在當今幾乎是預設設置：

java.lang.NoClassDefFoundError: Could not initialize class com.sun.jna.Native
       at org.apache.cassandra.utils.memory.MemoryUtil.allocate(MemoryUtil.java:82) ~[apache-cassandra-2.2.2.jar:2.2.2]
       at org.apache.cassandra.io.util.Memory.<init>(Memory.java:74) ~[apache-cassandra-2.2.2.jar:2.2.2]
       at org.apache.cassandra.io.util.Memory.allocate(Memory.java:97) ~[apache-cassandra-2.2.2.jar:2.2.2]
       at org.apache.cassandra.io.sstable.IndexSummary$IndexSummarySerializer.deserialize(IndexSummary.java:323) ~[apache-cassandra-2.2.2.jar:2.2.2]
       at org.apache.cassandra.io.sstable.format.SSTableReader.loadSummary(SSTableReader.java:836) ~[apache-cassandra-2.2.2.jar:2.2.2]
       at org.apache.cassandra.io.sstable.format.SSTableReader.load(SSTableReader.java:692) ~[apache-cassandra-2.2.2.jar:2.2.2]
       at org.apache.cassandra.io.sstable.format.SSTableReader.load(SSTableReader.java:664) ~[apache-cassandra-2.2.2.jar:2.2.2]
       at org.apache.cassandra.io.sstable.format.SSTableReader.open(SSTableReader.java:458) ~[apache-cassandra-2.2.2.jar:2.2.2]
       at org.apache.cassandra.io.sstable.format.SSTableReader.open(SSTableReader.java:363) ~[apache-cassandra-2.2.2.jar:2.2.2]
       at org.apache.cassandra.io.sstable.format.SSTableReader$4.run(SSTableReader.java:501) ~[apache-cassandra-2.2.2.jar:2.2.2]
       at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[na:1.8.0_102]
       at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[na:1.8.0_102]
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) ~[na:1.8.0_102]
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_102]
       at java.lang.Thread.run(Thread.java:745) [na:1.8.0_102]

如果我從裝載Cassandranoexec中刪除標誌，則可以正常啟動。我嘗試了多種方法來更改文件中 tmpdir 的位置：/var/tmp``cassandra-env.sh

JVM_OPTS="$JVM_OPTS -Djna.tmpdir=/home/cassandra/tmp"
JVM_OPTS="$JVM_OPTS -Djava.io.tmpdir=/home/cassandra/tmp"
JVM_OPTS="$JVM_OPTS -Dorg.xerial.snappy.tempdir=/home/cassandra/tmp"

我沒有一次使用這些，當然，這些是我在網際網路上找到的解決方案，但似乎沒有一個有效。TMPDIR我什至嘗試在文件開頭導出cassandra-env.sh，但無濟於事。它總是失敗並顯示相同的消息。

我認為在/tmp安全方面沒有 noexec 標誌離開是個壞主意。我顯然在這裡遺漏了一些基本的東西。如何將 tmpdir 設置為/home/cassandra/tmp或類似的東西？

啊，看起來這兩個選項都必須存在於cassandra-env.sh文件中：

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

引用自：https://serverfault.com/questions/827013