ES failed to notify ClusterStateListener java.lang.IllegalStateException: environment is not locked
阿里云国内75折 回扣 微信号:monov8 |
阿里云国际,腾讯云国际,低至75折。AWS 93折 免费开户实名账号 代冲值 优惠多多 微信号:monov8 飞机:@monov6 |
ES出现异常:
failed to notify ClusterStateListener
java.lang.IllegalStateException: environment is not locked
定位代码:
下载ES 5.5源码,在main/java/org/elasticsearch/env/NodeEnvironment.java 里可以看到:
private void assertEnvIsLocked() {
if (!closed.get() && locks != null) {
for (Lock lock : locks) {
try {
lock.ensureValid();
} catch (IOException e) {
logger.warn("lock assertion failed", e);
throw new IllegalStateException("environment is not locked", e);
}
}
}
}
assertEnvIsLocked调用地方,可以看到在检测ES node数据路径、index路径使用:
/**
* Returns an array of all of the nodes data locations.
* @throws IllegalStateException if the node is not configured to store local locations
*/
public Path[] nodeDataPaths() {
assertEnvIsLocked();
Path[] paths = new Path[nodePaths.length];
for(int i=0;i<paths.length;i++) {
paths[i] = nodePaths[i].path;
}
return paths;
}
/**
* Returns an array of all of the {@link NodePath}s.
*/
public NodePath[] nodePaths() {
assertEnvIsLocked();
if (nodePaths == null || locks == null) {
throw new IllegalStateException("node is not configured to store local location");
}
return nodePaths;
}
public int getNodeLockId() {
assertEnvIsLocked();
if (nodePaths == null || locks == null) {
throw new IllegalStateException("node is not configured to store local location");
}
return nodeLockId;
}
/**
* Returns all index paths.
*/
public Path[] indexPaths(Index index) {
assertEnvIsLocked();
Path[] indexPaths = new Path[nodePaths.length];
for (int i = 0; i < nodePaths.length; i++) {
indexPaths[i] = nodePaths[i].resolve(index);
}
return indexPaths;
}
而locks变量的赋值在:
public NodeEnvironment(Settings settings, Environment environment) throws IOException {
if (!DiscoveryNode.nodeRequiresLocalStorage(settings)) {
nodePaths = null;
sharedDataPath = null;
locks = null;
nodeLockId = -1;
nodeMetaData = new NodeMetaData(generateNodeId(settings));
logger = Loggers.getLogger(getClass(), Node.addNodeNameIfNeeded(settings, this.nodeMetaData.nodeId()));
return;
}
final NodePath[] nodePaths = new NodePath[environment.dataWithClusterFiles().length];
final Lock[] locks = new Lock[nodePaths.length];
boolean success = false;
。。。
查了下Lock这个类:
import org.apache.lucene.store.Lock
作用:
- org.apache.lucene.store.Lock
- An interprocess mutex lock.
Typical use might look like:
LockObtainFailedException
1. lucene并发规则
a,任意数量的只读属性IndexReader类都可以同时打开一个索引。
b,对于一个索引来说,一次只能打开一个IndexWriter对象。lucene采用锁来提供保障。
c,IndexReader可以在indexwriter正在修改索引时打开。该对象只有在IndexWriter提交修改或自己重新打开后才能获知索引的修改情况。
d,任意多个线程可以共享同一个indexreader或indexwriter。
2. lucene锁机制
为了实现单一的writer,lucene采用了基于文件的锁,如果锁文件(默认writer.lock)存在于你的索引所在目录内,说明此时正在打开一个writer。此时若企图对同一个索引文件创建其他的writer的话,将产生一个LockObtainFailedException异常。
而由assertEnvIsLocked看,抛出的异常应该是锁出现了问题,文件损坏或者目录损坏、或者文件系统损坏导致。
阿里云国内75折 回扣 微信号:monov8 |
阿里云国际,腾讯云国际,低至75折。AWS 93折 免费开户实名账号 代冲值 优惠多多 微信号:monov8 飞机:@monov6 |