Karthik Prasad created ZOOKEEPER-3784:
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Summary: PrometheusProvider uses deprecated sun.misc.Unsafe
Key: ZOOKEEPER-3784
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-3784
Project: ZooKeeper
Issue Type: Bug
Components: metric system
Affects Versions: 3.6.0
Reporter: Karthik Prasad
Attachments: zoo.log
Enabled Prometheus Metrics Server on zookeeper that is running on
OpenJDK-11.0.5 with minimal modules enabled. Server crashed with below error.
{code:java}
// code placeholder
{code}
2020-04-04 05:17:32,310 [myid:1] - INFO [main:AbstractConnector@330] - Started
ServerConnector@7c711375\{HTTP/1.1,[http/1.1]}{0.0.0.0:7000}2020-04-04
05:17:32,310 [myid:1] - INFO [main:AbstractConnector@330] - Started
ServerConnector@7c711375\{HTTP/1.1,[http/1.1]}{0.0.0.0:7000}2020-04-04
05:17:32,311 [myid:1] - INFO [main:Server@399] - Started @897ms2020-04-04
05:17:32,321 [myid:1] - INFO [main:ServerMetrics@62] - ServerMetrics
initialized with provider
org.apache.zookeeper.metrics.prometheus.PrometheusMetricsProvider@5efa40fe2020-04-04
05:17:32,334 [myid:1] - INFO [main:AbstractConnector@380] - Stopped
ServerConnector@7c711375\{HTTP/1.1,[http/1.1]}{0.0.0.0:7000}2020-04-04
05:17:32,335 [myid:1] - INFO [main:ContextHandler@1016] - Stopped
o.e.j.s.ServletContextHandler@4c163e3\{/,null,UNAVAILABLE}Exception in thread
"main" java.lang.NoClassDefFoundError: sun/misc/Unsafe at
io.prometheus.client.Striped64.getUnsafe(Striped64.java:316) at
io.prometheus.client.Striped64.<clinit>(Striped64.java:296) at
io.prometheus.client.Summary$Child.<init>(Summary.java:260) at
io.prometheus.client.Summary$Child.<init>(Summary.java:198) at
io.prometheus.client.Summary.newChild(Summary.java:159) at
io.prometheus.client.Summary.newChild(Summary.java:81) at
io.prometheus.client.SimpleCollector.labels(SimpleCollector.java:76) at
io.prometheus.client.SimpleCollector.initializeNoLabelsChild(SimpleCollector.java:107)
at io.prometheus.client.Summary.<init>(Summary.java:92) at
io.prometheus.client.Summary$Builder.create(Summary.java:136) at
io.prometheus.client.Summary$Builder.create(Summary.java:95) at
io.prometheus.client.SimpleCollector$Builder.register(SimpleCollector.java:245)
at
org.apache.zookeeper.metrics.prometheus.PrometheusMetricsProvider$PrometheusSummary.<init>(PrometheusMetricsProvider.java:348)
at
org.apache.zookeeper.metrics.prometheus.PrometheusMetricsProvider$Context.lambda$getSummary$2(PrometheusMetricsProvider.java:235)
at java.base/java.util.concurrent.ConcurrentHashMap.computeIfAbsent(Unknown
Source) at
org.apache.zookeeper.metrics.prometheus.PrometheusMetricsProvider$Context.getSummary(PrometheusMetricsProvider.java:231)
at org.apache.zookeeper.server.ServerMetrics.<init>(ServerMetrics.java:70) at
org.apache.zookeeper.server.ServerMetrics.metricsProviderInitialized(ServerMetrics.java:63)
at
org.apache.zookeeper.server.quorum.QuorumPeerMain.runFromConfig(QuorumPeerMain.java:161)
at
org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:136)
at
org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:90)Caused
by: java.lang.ClassNotFoundException: sun.misc.Unsafe at
java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(Unknown Source) at
java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(Unknown
Source) at java.base/java.lang.ClassLoader.loadClass(Unknown Source) ... 21 more
When I enabled jdk.unsupported module, zookeeper server started and able to
access prometheus metrics. However jdk.unsupported is deprecated.
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