Program: 116450
Project: 116450
Buggy source:
@Override public void unregisterService(String clusterId) throws UnregisteredClusterException {
  final String clusterId_=clusterId;
  ClusterContext ctxt=dataHolder.getClusterContext(clusterId_);
  handleNullObject(ctxt,"String_Node_Str" + clusterId);
  String cartridgeType=ctxt.getCartridgeType();
  Cartridge cartridge=dataHolder.getCartridge(cartridgeType);
  if (cartridge == null) {
    String msg="String_Node_Str" + cartridgeType + "String_Node_Str";
    LOG.error(msg);
    throw new UnregisteredClusterException(msg);
  }
  if (StratosConstants.KUBERNETES_DEPLOYER_TYPE.equals(cartridge.getDeployerType())) {
    unregisterDockerService(clusterId_);
  }
 else {
    TopologyBuilder.handleClusterMaintenanceMode(dataHolder.getClusterContext(clusterId_));
    Runnable terminateInTimeout=new Runnable(){
      @Override public void run(){
        ClusterContext ctxt=dataHolder.getClusterContext(clusterId_);
        if (ctxt == null) {
          String msg="String_Node_Str" + clusterId_;
          LOG.error(msg);
        }
        Collection<Member> members=TopologyManager.getTopology().getService(ctxt.getCartridgeType()).getCluster(clusterId_).getMembers();
        int sizeOfRespondingMembers=0;
        for (        Member member : members) {
          if (member.getStatus().getCode() >= MemberStatus.Activated.getCode()) {
            sizeOfRespondingMembers++;
          }
        }
        long endTime=System.currentTimeMillis() + ctxt.getTimeoutInMillis() * sizeOfRespondingMembers;
        while (System.currentTimeMillis() < endTime) {
          CloudControllerUtil.sleep(1000);
        }
        if (members.size() > 0) {
          for (          Member member : members) {
            try {
              terminateInstance(member.getMemberId());
            }
 catch (            Exception e) {
              LOG.warn("String_Node_Str" + member.getMemberId(),e);
            }
          }
        }
      }
    }
;
    Runnable unregister=new Runnable(){
      public void run(){
        ClusterContext ctxt=dataHolder.getClusterContext(clusterId_);
        if (ctxt == null) {
          String msg="String_Node_Str" + clusterId_;
          LOG.error(msg);
        }
        Collection<Member> members=TopologyManager.getTopology().getService(ctxt.getCartridgeType()).getCluster(clusterId_).getMembers();
        while (members.size() > 0) {
          CloudControllerUtil.sleep(1000);
        }
        LOG.info("String_Node_Str" + clusterId_);
        deleteVolumes(ctxt);
        onClusterRemoval(clusterId_);
      }
      private void deleteVolumes(      ClusterContext ctxt){
        if (ctxt.isVolumeRequired()) {
          Cartridge cartridge=dataHolder.getCartridge(ctxt.getCartridgeType());
          if (cartridge != null && cartridge.getIaases() != null && ctxt.getVolumes() != null) {
            for (            Volume volume : ctxt.getVolumes()) {
              if (volume.getId() != null) {
                String iaasType=volume.getIaasType();
                Iaas iaas=cartridge.getIaasProvider(iaasType).getIaas();
                if (iaas != null) {
                  try {
                    if (volume.isRemoveOntermination()) {
                      iaas.deleteVolume(volume.getId());
                      volume.setId(null);
                    }
                  }
 catch (                  Exception ignore) {
                    if (LOG.isErrorEnabled()) {
                      LOG.error("String_Node_Str" + volume.getId(),ignore);
                    }
                  }
                }
              }
            }
          }
        }
      }
    }
;
    new Thread(terminateInTimeout).start();
    new Thread(unregister).start();
  }
}

Fixed version (ground truth):
@Override public void unregisterService(String clusterId) throws UnregisteredClusterException {
  final String clusterId_=clusterId;
  ClusterContext ctxt=dataHolder.getClusterContext(clusterId_);
  handleNullObject(ctxt,"String_Node_Str" + clusterId);
  String cartridgeType=ctxt.getCartridgeType();
  Cartridge cartridge=dataHolder.getCartridge(cartridgeType);
  if (cartridge == null) {
    String msg="String_Node_Str" + cartridgeType + "String_Node_Str";
    LOG.error(msg);
    throw new UnregisteredClusterException(msg);
  }
  if (StratosConstants.KUBERNETES_DEPLOYER_TYPE.equals(cartridge.getDeployerType())) {
    unregisterDockerService(clusterId_);
  }
 else {
    TopologyBuilder.handleClusterMaintenanceMode(dataHolder.getClusterContext(clusterId_));
    Runnable terminateInTimeout=new Runnable(){
      @Override public void run(){
        ClusterContext ctxt=dataHolder.getClusterContext(clusterId_);
        if (ctxt == null) {
          String msg="String_Node_Str" + clusterId_;
          LOG.error(msg);
          return;
        }
        Collection<Member> members=TopologyManager.getTopology().getService(ctxt.getCartridgeType()).getCluster(clusterId_).getMembers();
        int sizeOfRespondingMembers=0;
        for (        Member member : members) {
          if (member.getStatus().getCode() >= MemberStatus.Activated.getCode()) {
            sizeOfRespondingMembers++;
          }
        }
        long endTime=System.currentTimeMillis() + ctxt.getTimeoutInMillis() * sizeOfRespondingMembers;
        while (System.currentTimeMillis() < endTime) {
          CloudControllerUtil.sleep(1000);
        }
        if (members.size() > 0) {
          for (          Member member : members) {
            try {
              terminateInstance(member.getMemberId());
            }
 catch (            Exception e) {
              LOG.warn("String_Node_Str" + member.getMemberId(),e);
            }
          }
        }
      }
    }
;
    Runnable unregister=new Runnable(){
      public void run(){
        ClusterContext ctxt=dataHolder.getClusterContext(clusterId_);
        if (ctxt == null) {
          String msg="String_Node_Str" + clusterId_;
          LOG.error(msg);
          return;
        }
        Collection<Member> members=TopologyManager.getTopology().getService(ctxt.getCartridgeType()).getCluster(clusterId_).getMembers();
        while (members.size() > 0) {
          CloudControllerUtil.sleep(1000);
        }
        LOG.info("String_Node_Str" + clusterId_);
        deleteVolumes(ctxt);
        onClusterRemoval(clusterId_);
      }
      private void deleteVolumes(      ClusterContext ctxt){
        if (ctxt.isVolumeRequired()) {
          Cartridge cartridge=dataHolder.getCartridge(ctxt.getCartridgeType());
          if (cartridge != null && cartridge.getIaases() != null && ctxt.getVolumes() != null) {
            for (            Volume volume : ctxt.getVolumes()) {
              if (volume.getId() != null) {
                String iaasType=volume.getIaasType();
                Iaas iaas=cartridge.getIaasProvider(iaasType).getIaas();
                if (iaas != null) {
                  try {
                    if (volume.isRemoveOntermination()) {
                      iaas.deleteVolume(volume.getId());
                      volume.setId(null);
                    }
                  }
 catch (                  Exception ignore) {
                    if (LOG.isErrorEnabled()) {
                      LOG.error("String_Node_Str" + volume.getId(),ignore);
                    }
                  }
                }
              }
            }
          }
        }
      }
    }
;
    new Thread(terminateInTimeout).start();
    new Thread(unregister).start();
  }
}