orientdb - 在分发处于活动状态的情况下打开文档数据库时出现 StackOverflow 错误

Question

我正在尝试让 Orient DB 运行嵌入式和分布式。现在，如果 hazelcast 插件处于活动状态，每当我打开本地数据库时，我都会面临 StackOverflowError。当我关闭 hazelcast 插件时，一切都很好。

OrientDB 陷入了这个循环：

at com.orientechnologies.orient.server.distributed.ODistributedAbstractPlugin.onOpen(ODistributedAbstractPlugin.java:141)
at com.orientechnologies.orient.core.db.raw.ODatabaseRaw.open(ODatabaseRaw.java:107)
at com.orientechnologies.orient.core.db.ODatabaseWrapperAbstract.open(ODatabaseWrapperAbstract.java:49)
at com.orientechnologies.orient.core.db.record.ODatabaseRecordAbstract.open(ODatabaseRecordAbstract.java:118)
at com.orientechnologies.orient.core.db.ODatabaseWrapperAbstract.open(ODatabaseWrapperAbstract.java:49)
at com.orientechnologies.orient.server.OServer.openDatabase(OServer.java:657)
at com.orientechnologies.orient.server.distributed.conflict.ODefaultReplicationConflictResolver.startup(ODefaultReplicationConflictResolver.java:74)
at com.orientechnologies.orient.server.distributed.OStorageSynchronizer.<init>(OStorageSynchronizer.java:56)
at com.orientechnologies.orient.server.distributed.ODistributedAbstractPlugin.getDatabaseSynchronizer(ODistributedAbstractPlugin.java:197)
at com.orientechnologies.orient.server.distributed.ODistributedAbstractPlugin.onOpen(ODistributedAbstractPlugin.java:141)
at com.orientechnologies.orient.core.db.raw.ODatabaseRaw.open(ODatabaseRaw.java:107)
at com.orientechnologies.orient.core.db.ODatabaseWrapperAbstract.open(ODatabaseWrapperAbstract.java:49)
at com.orientechnologies.orient.core.db.record.ODatabaseRecordAbstract.open(ODatabaseRecordAbstract.java:118)
at com.orientechnologies.orient.core.db.ODatabaseWrapperAbstract.open(ODatabaseWrapperAbstract.java:49)
at com.orientechnologies.orient.server.OServer.openDatabase(OServer.java:657)
at com.orientechnologies.orient.server.distributed.conflict.ODefaultReplicationConflictResolver.startup(ODefaultReplicationConflictResolver.java:74)
at com.orientechnologies.orient.server.distributed.OStorageSynchronizer.<init>(OStorageSynchronizer.java:56)
at com.orientechnologies.orient.server.distributed.ODistributedAbstractPlugin.getDatabaseSynchronizer(ODistributedAbstractPlugin.java:197)
at com.orientechnologies.orient.server.distributed.ODistributedAbstractPlugin.onOpen(ODistributedAbstractPlugin.java:141)

ODatabaseRaw.open 有一个侦听器列表，当 Hazelcast 处于活动状态时，插件被注册为侦听器，并且在每次方法运行时都会被调用。

有人有什么想法吗？

编辑：我有点让它工作，我从 github 获取了分布式配置。当我删除以下行时，它可以工作：

<parameter name="conflict.resolver.impl" value="com.orientechnologies.orient.server.distributed.conflict.ODefaultReplicationConflictResolver" />

不过，我不确定这是否是一个很好的解决方案，所以请随时指出更好的解决方案 =)

我的完整配置如下所示：db.config：

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<orient-server>
<network>
     <protocols>
     <protocol name="binary" implementation="com.orientechnologies.orient.server.network.protocol.binary.ONetworkProtocolBinary"/>
     <protocol name="http" implementation="com.orientechnologies.orient.server.network.protocol.http.ONetworkProtocolHttpDb"/>
     </protocols>
     <listeners>
     <listener ip-address="0.0.0.0" port-range="2480-2490" protocol="http"/>
     </listeners>
     </network>
     <users>
     <user name="root" password="ThisIsA_TEST" resources="*"/>
     </users>
     <properties>
     <entry name="server.cache.staticResources" value="false"/>
     <entry name="server.database.path" value="."/>
     <entry name="log.console.level" value="info"/> <entry name="log.file.level" value="fine"/>
     </properties>
  <handlers>
    <handler class="com.orientechnologies.orient.server.hazelcast.OHazelcastPlugin">
      <parameters>
        <!-- <parameter name="alias" value="europe1" /> -->
        <parameter name="enabled" value="true" />
        <parameter name="configuration.db.default" value="src/main/resources/default-distributed-db-config.json" />
        <parameter name="configuration.hazelcast" value="src/main/resources/hazelcast.xml" />
        <parameter name="alignment.startup" value="true" />
        <parameter name="alignment.timer" value="120000" />
      </parameters>
    </handler>
  </handlers>
</orient-server>

default-distributed-db-config.json （github 上的示例中缺少“}”）：

{
  "synchronization" : true,
  "clusters" : {
    "internal" : { "synchronization" : false },
    "ODistributedConflict" : { "synchronization" : false },
    "*" : {
      "synchronization" : true,
      "master" : "$auto",
      "synch-replicas" : 0,
      "asynch-replicas" : "100%" },
    "index" : { "synchronization" : false }
    }
}

hazelcast.xml

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<hazelcast xsi:schemaLocation="http://www.hazelcast.com/schema/config hazelcast-basic.xsd"
    xmlns="http://www.hazelcast.com/schema/config" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <group>
        <name>orientdb</name>
        <password>orientdb</password>
    </group>
    <network>
        <port auto-increment="true">5701</port>
        <join>
            <multicast enabled="false">
                <multicast-group>224.2.2.3</multicast-group>
                <multicast-port>54327</multicast-port>
            </multicast>
            <tcp-ip enabled="true">
                <interface>127.0.0.1</interface>
            </tcp-ip>
        </join>
    </network>

</hazelcast>

编辑2：

当两个实例尝试同步时出现另一个 StackOverflowError：

java.lang.StackOverflowError
-> com.hazelcast.core.DistributedTask.get(DistributedTask.java:126)
-> com.orientechnologies.orient.server.hazelcast.OHazelcastPlugin$1.done(OHazelcastPlugin.java:204)
-> com.hazelcast.impl.ExecutorManager$3.run(ExecutorManager.java:355)
-> com.hazelcast.impl.executor.ParallelExecutorService$ParallelExecutorImpl$ExecutionSegment.run(ParallelExecutorService.java:212)
-> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
-> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
-> java.lang.Thread.run(Thread.java:722)
-> com.hazelcast.impl.ExecutorThreadFactory$1.run(ExecutorThreadFactory.java:38)
null
-> com.hazelcast.core.DistributedTask.get(DistributedTask.java:126)
-> com.orientechnologies.orient.server.hazelcast.OHazelcastPlugin$1.done(OHazelcastPlugin.java:204)
-> com.hazelcast.impl.ExecutorManager$3.run(ExecutorManager.java:355)
-> com.hazelcast.impl.executor.ParallelExecutorService$ParallelExecutorImpl$ExecutionSegment.run(ParallelExecutorService.java:212)
-> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
-> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
-> java.lang.Thread.run(Thread.java:722)
-> com.hazelcast.impl.ExecutorThreadFactory$1.run(ExecutorThreadFactory.java:38)

在运行分布式和嵌入式时似乎还不是很稳定。可惜了，一直很喜欢。。。