fix: ensure that multiple instances of a client in the same process dont clobber each other (#2590)

* fix: ensure that multiple instances of a client in the same process dont clobber each other Change-Id: I2087777f1f2d37c62f33c63a7ecb67f7a93712b8 * chore: generate libraries at Wed May 28 14:16:03 UTC 2025 --------- Co-authored-by: cloud-java-bot <cloud-java-bot@google.com>

Author: igorbernstein2

google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/data/v2/stub/metrics/BigtableCloudMonitoringExporter.java

@@ -66,6 +66,7 @@
 import java.util.Map;
 import java.util.Optional;
 import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicLong;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 import java.util.stream.Collectors;
@@ -302,10 +303,14 @@ static class PublicTimeSeriesConverter implements TimeSeriesConverter {
  .map(m -> METER_NAME + m)
  .collect(ImmutableList.toImmutableList());
 
+ private static final AtomicLong nextTaskIdSuffix = new AtomicLong();
  private final String taskId;
 
  PublicTimeSeriesConverter() {
- this(BigtableExporterUtils.DEFAULT_TASK_VALUE.get());
+ this(
+ BigtableExporterUtils.DEFAULT_TASK_VALUE.get()
+ + "-"
+ + nextTaskIdSuffix.getAndIncrement());
  }
 
  PublicTimeSeriesConverter(String taskId) {

google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/data/v2/stub/metrics/BigtableExporterUtils.java

@@ -79,6 +79,7 @@
 import java.util.Optional;
 import java.util.Set;
 import java.util.UUID;
+import java.util.concurrent.atomic.AtomicLong;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 import java.util.stream.Collectors;
@@ -102,6 +103,8 @@ class BigtableExporterUtils {
  GCPPlatformDetector.SupportedPlatform.GOOGLE_COMPUTE_ENGINE, "gcp_compute_engine",
  GCPPlatformDetector.SupportedPlatform.GOOGLE_KUBERNETES_ENGINE, "gcp_kubernetes_engine");
 
+ private static final AtomicLong nextUuidSuffix = new AtomicLong();
+
  private BigtableExporterUtils() {}
 
  /**
@@ -249,7 +252,7 @@ private static MonitoredResource detectResource(EnhancedBigtableStubSettings set
  .putLabels("host_id", attrs.get(AttributeKeys.GKE_HOST_ID))
  .putLabels("host_name", hostname)
  .putLabels("client_name", CLIENT_NAME)
- .putLabels("uuid", DEFAULT_TASK_VALUE.get())
+ .putLabels("uuid", DEFAULT_TASK_VALUE.get() + "-" + nextUuidSuffix.getAndIncrement())
  .build();
  }