[HDDS-10138] NPE for SstFilteringService in OMDBCheckpointServlet.Lock

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.4.0
• Fix Version/s: 2.0.0, 1.4.1
• Component/s: OM
• Labels: pull-request-available
• Target Version/s: 2.0.0, 1.4.1
• Assignee: Ivan Andika
• Reporter: Ivan Andika
• Created: 17/Jan/24 03:42
• Updated: 29/Jan/24 09:51
• Resolved: 19/Jan/24 12:06

Description

Found when testing Ozone-1.4.0-rc1.

2024-01-17 10:56:29,321 [qtp3981395-71] ERROR org.apache.hadoop.hdds.utils.DBCheckpointServlet: Unable to process metadata snapshot request.
java.lang.NullPointerException
    at org.apache.hadoop.ozone.om.OMDBCheckpointServlet$Lock.lock(OMDBCheckpointServlet.java:667)
    at org.apache.hadoop.hdds.utils.DBCheckpointServlet.generateSnapshotCheckpoint(DBCheckpointServlet.java:197)
    at org.apache.hadoop.hdds.utils.DBCheckpointServlet.doGet(DBCheckpointServlet.java:303)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:799)
    at org.eclipse.jetty.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1656)
    at org.apache.hadoop.http.lib.StaticUserWebFilter$StaticUserFilter.doFilter(StaticUserWebFilter.java:110)
    at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
    at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1626)
    at org.apache.hadoop.hdds.server.http.HttpServer2$QuotingInputFilter.doFilter(HttpServer2.java:1665)
    at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
    at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1626)
    at org.apache.hadoop.hdds.server.http.NoCacheFilter.doFilter(NoCacheFilter.java:48)
    at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
    at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1626)
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:552)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
    at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:600)
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)

Issue Links

• causes: HDDS-10137 OM DB snapshot unable to be downloaded
• is caused by: HDDS-8209 Synchronize tarball creation with background processes
• relates to: HDDS-10137 OM DB snapshot unable to be downloaded
• links to: GitHub Pull Request #6015