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Fix npe

This commit is contained in:
wu-sheng 2017-12-19 15:27:14 +08:00
parent 5319d72f3f
commit 09b979c5af
1 changed files with 4 additions and 2 deletions
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6
apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/sampling/SamplingService.java
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@ -26,10 +26,10 @@ import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import org.apache.skywalking.apm.agent.core.boot.BootService;
import org.apache.skywalking.apm.agent.core.boot.DefaultNamedThreadFactory;
import org.apache.skywalking.apm.agent.core.conf.Config;
import org.apache.skywalking.apm.agent.core.context.trace.TraceSegment;
import org.apache.skywalking.apm.agent.core.logging.api.ILog;
import org.apache.skywalking.apm.agent.core.logging.api.LogManager;
import org.apache.skywalking.apm.agent.core.conf.Config;
/**
* The <code>SamplingService</code> take charge of how to sample the {@link TraceSegment}. Every {@link TraceSegment}s
@ -83,7 +83,9 @@ public class SamplingService implements BootService {
@Override
public void shutdown() throws Throwable {
scheduledFuture.cancel(true);
if (scheduledFuture != null) {
scheduledFuture.cancel(true);
}
}
/**