Neo4j 嵌入式数据库在应用程序异常终止后挂起 [英] Neo4j Embedded database hangs after abnormal application termination
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问题描述
我将公开我的第一个基于 Neo4j 嵌入式数据库的应用程序，但遇到了严重的阻塞问题 -
I'm going to make my first application based on Neo4j Embedded database public and ran into a serious blocking issue -
这是我之前遇到的数据库删除问题有效清除 Neo4j 数据库
This my previous question with database deleting where I'm faced this issue Effectively clear Neo4j database
我使用:
OS: Windows 8.1
jdk1.8.0_51
neo4j version 2.2.3
lucene version 3.6.2
spring-data-neo4j version 3.4.0.M1
我注意到如果在终止我的应用程序之前使用 graphDatabaseService.shutdown(); 方法，一切正常.否则数据库将被破坏(不仅是我的应用程序，甚至 Neo4j 服务器也挂在这个上当我尝试使用 Neo4j Web 界面加载我的嵌入式数据库时损坏的数据库).
I noticed that everything works properly if I use graphDatabaseService.shutdown(); method before terminating of my application.. Otherwise database is destroyed(not only my application but even Neo4j server also hangs on this corrupted db when I try to load my embedded db with Neo4j Web interface).
有什么办法可以让 Neo4j 嵌入式数据库更容错?在生产环境中出现第一个错误(例如停电事件)后，我将丢失所有数据..
Is any way to make Neo4j Embedded database more fault tolerant ? I will lose all my data after the first error (for example blackout event) in the production environment..
我在这个问题上花了几天时间，但仍然不知道如何处理它.请帮忙.
I spent a few days on this issue but still have no ideas how to proceed with it. Please help.
更新
来自 message.log 的信息
info from message.log
2015-07-27 08:51:59.232+0000 INFO [o.n.k.i.DiagnosticsManager]: index:
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2015-07-27 08:51:59.233+0000 INFO [o.n.k.i.DiagnosticsManager]: node:
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2015-07-27 08:51:59.288+0000 INFO [o.n.k.i.DiagnosticsManager]: neostore.transaction.db.0: 2015-07-27T11:50:43+0300 - 251,72 MB
2015-07-27 08:51:59.289+0000 INFO [o.n.k.i.DiagnosticsManager]: neostore.transaction.db.1: 2015-07-27T11:50:48+0300 - 6,12 MB
2015-07-27 08:51:59.289+0000 INFO [o.n.k.i.DiagnosticsManager]: schema:
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2015-07-27 08:51:59.305+0000 INFO [o.n.k.i.DiagnosticsManager]: store_lock: 2015-07-27T11:48:16+0300 - 0,00 B
2015-07-27 08:51:59.305+0000 INFO [o.n.k.i.DiagnosticsManager]: --- STARTED diagnostics for KernelDiagnostics:StoreFiles END ---
2015-07-27 08:51:59.378+0000 INFO [o.n.k.EmbeddedGraphDatabase]: Database is now ready
2015-07-27 08:52:02.592+0000 WARN [o.n.k.EmbeddedGraphDatabase]: GC Monitor: Application threads blocked for 399ms.
2015-07-27 08:52:08.474+0000 INFO [o.n.k.i.a.i.s.OnlineIndexSamplingJob]: Sampled index :Criterion(name) with 18159 unique values in sample of avg size 18159 taken from index containing 18159 entries
2015-07-27 08:52:11.514+0000 WARN [o.n.k.EmbeddedGraphDatabase]: GC Monitor: Application threads blocked for 354ms.
2015-07-27 08:52:13.692+0000 WARN [o.n.k.EmbeddedGraphDatabase]: GC Monitor: Application threads blocked for 336ms.
2015-07-27 08:52:18.760+0000 WARN [o.n.k.EmbeddedGraphDatabase]: GC Monitor: Application threads blocked for 3728ms.
2015-07-27 08:52:18.764+0000 INFO [o.n.k.i.a.i.s.OnlineIndexSamplingJob]: Sampled index :CriterionGroup(name) with 1691 unique values in sample of avg size 1691 taken from index containing 1691 entries
2015-07-27 08:52:19.951+0000 WARN [o.n.k.EmbeddedGraphDatabase]: GC Monitor: Application threads blocked for 490ms.
2015-07-27 08:52:25.130+0000 WARN [o.n.k.EmbeddedGraphDatabase]: GC Monitor: Application threads blocked for 4476ms.
2015-07-27 08:52:26.492+0000 WARN [o.n.k.EmbeddedGraphDatabase]: GC Monitor: Application threads blocked for 761ms.
2015-07-27 08:52:33.603+0000 WARN [o.n.k.EmbeddedGraphDatabase]: GC Monitor: Application threads blocked for 5408ms.
2015-07-27 08:52:35.734+0000 WARN [o.n.k.EmbeddedGraphDatabase]: GC Monitor: Application threads blocked for 809ms.
2015-07-27 08:52:43.564+0000 WARN [o.n.k.EmbeddedGraphDatabase]: GC Monitor: Application threads blocked for 5601ms.
在删除操作期间应用程序挂在tx.close();行:
During delete operation application hangs on tx.close(); line:
public class Neo4jUtils {
final static Logger logger = LoggerFactory.getLogger(Neo4jUtils.class);
private static final int BATCH_SIZE = 10;
public static void cleanDb(Neo4jTemplate template) {
logger.info("Cleaning database");
long deletedNodesCount = 0;
do {
GraphDatabaseService graphDatabaseService = template.getGraphDatabaseService();
Transaction tx = graphDatabaseService.beginTx();
try {
Result<Map<String, Object>> result = template.query("MATCH (n) WITH n LIMIT " + BATCH_SIZE + " OPTIONAL MATCH (n)-[r]-() DELETE n, r RETURN count(n) as count", null);
deletedNodesCount = (long) result.single().get("count");
tx.success();
logger.info("Deleted " + deletedNodesCount + " nodes...");
} catch (Throwable th) {
logger.error("Error while deleting database", th);
throw th;
} finally {
tx.close();
}
} while (deletedNodesCount > 0);
}
}
更新
我找到了这个问题的一般来源，但现在不知道如何解决它.
I found the general source of this issue but have no idea right now how to fix it.
这是我的WebSecurityConfig:
@Configuration
@EnableWebSecurity
@EnableWebMvcSecurity
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
@Autowired
private SocialAuthenticationSuccessHandler socialAuthenticationSuccessHandler;
@Autowired
private TokenAuthenticationService tokenAuthenticationService;
@Autowired
private TokenAuthenticationFilter tokenAuthenticationFilter;
@Autowired
private DBUserDetailsService userDetailsService;
.....
}
我自动装配了 4 个内部使用 Neo4j 的字段(DAO、存储库等).当这些字段存在于我的 WebSecurityConfig 中时，Neo4j 在不正常关闭后挂起重新启动.当我评论这些字段时，问题就会消失.
I autowired 4 fields that internally use Neo4j(DAO, repositories and so on). Neo4j hangs on the restart after unclean shutdown when these fields are present inside of my WebSecurityConfig. When I comment these fields the issue disappears.
有什么问题?
推荐答案
我可以确认此问题与以下修复有关 - https://github.com/neo4j/neo4j/commit/c9596af0d990d7dde9a9053799b7295985ae3c05
I can confirm that this issue related to the following fix - https://github.com/neo4j/neo4j/commit/c9596af0d990d7dde9a9053799b7295985ae3c05
我已经应用了这次提交的更改，问题消失了.
I have applied the changes from this commit and the issue is gone.
所以，现在我正在等待 Neo4j 2.2.4 的发布.
So, right now I'm waiting for Neo4j 2.2.4 release.
你知道 Neo4j 2.2.4 的计划发布日期吗?
Do you know the planned release date for Neo4j 2.2.4 ?
这篇关于Neo4j 嵌入式数据库在应用程序异常终止后挂起的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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