NetWorker RESTAPIが「Native Library /nsr/authc/webapps/nwrestapi/WEB-INF/lib/librestapi64.so already loaded in another classloader」のロードに失敗する

Summary: NetWorker RESTAPIがロード スローに失敗する: "java.lang.UnsatisfiedLinkError: Native Library /nsr/authc/webapps/nwrestapi/WEB-INF/lib/librestapi64.so already loaded in another classloader」

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Symptoms

  • NetWorker RESTAPIがロード スローに失敗する: "java.lang.UnsatisfiedLinkError: Native Library /nsr/authc/webapps/nwrestapi/WEB-INF/lib/librestapi64.so already loaded in another classloader」
HTTP Status 500 - Servlet.init() for servlet nwrestapi threw exception

type Exception report

message Servlet.init() for servlet nwrestapi threw exception

description The server encountered an internal error that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: Servlet.init() for servlet nwrestapi threw exception
	org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:506)
	org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
	org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:962)
	org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:445)
	org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1115)
	org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)
	org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1775)
	org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1734)
	java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	java.lang.Thread.run(Unknown Source)

root cause

java.lang.UnsatisfiedLinkError: Native Library /nsr/authc/webapps/nwrestapi/WEB-INF/lib/librestapi64.so already loaded in another classloader
	java.lang.ClassLoader.loadLibrary0(Unknown Source)
	java.lang.ClassLoader.loadLibrary(Unknown Source)
	java.lang.Runtime.load0(Unknown Source)
	java.lang.System.load(Unknown Source)
	com.emc.nw.webapi.WebApiServlet.loadDbSessionModules(WebApiServlet.java:75)
	com.emc.nw.webapi.WebApiServlet.init(WebApiServlet.java:55)
	org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:506)
	org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
	org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:962)
	org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:445)
	org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1115)
	org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)
	org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1775)
	org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1734)
	java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	java.lang.Thread.run(Unknown Source)
  • lsofコマンドは、ライブラリをDEL状態で表示します。
[root@nw_server ~]#  lsof | grep librestapi64
jsvc       4543 nsrtomcat  DEL       REG              253,2   14881546   67764661 /nsr/authc/webapps/nwrestapi/WEB-INF/lib/librestapi64.so

Cause

ライブラリが DEL 状態(古いライブラリファイルディスクリプタ)にあり、通常のライブラリのロードを妨げている。したがって、エラーは「すでに別のクラスローダーにロード済み」と表示されます。

Resolution

(1)メモリーをフラッシュ/再ロードするために再起動されたサーバー: NetWorker RESTAPIが「Native Library /nsr/authc/webapps/nwrestapi/WEB-INF/lib/librestapi64.so already loaded in another classloader」の
ロードに失敗する(2)Java cacertsキーストアにインポートされたemcauthctomcat.cer: NetWorker：Cacertsキーストアから削除されたNetWorker REST API emcauthctomcat証明書

Affected Products

NetWorker

Products

NetWorker
Article Properties
Article Number: 000037878
Article Type: Solution
Last Modified: 13 May 2025
Version:  4
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