catch error when initializing hazelcast

should fix https://github.com/yacy/yacy_search_server/issues/468

htroot/api/localpeers.java

@@ -41,14 +41,14 @@ public class localpeers {
     public static serverObjects respond(@SuppressWarnings("unused") final RequestHeader header, @SuppressWarnings("unused") final serverObjects post, @SuppressWarnings("unused") final serverSwitch env) {
         final servletProperties prop = new servletProperties();
         int c = 0;
-        for (String urlstub: Switchboard.getSwitchboard().localcluster_scan) {
+        for (final String urlstub: Switchboard.getSwitchboard().localcluster_scan) {
             prop.putJSON("peers_" + c + "_urlstub", urlstub); // a usrlstub is a full url with protocol, host and port up the the path start including first "/"
             c++;
         }
         prop.put("peers", c);
         try {
             prop.put("status", systemStatus().toString(2));
-        } catch (JSONException e) {
+        } catch (final JSONException e) {
             prop.put("status", "");
         }
         // return rewrite properties
@@ -58,14 +58,15 @@ public class localpeers {
     public static JSONObject systemStatus() throws JSONException {
 
         // generate json
-        JSONObject systemStatus = new JSONObject(true);
-        Memory.status().forEach((k, v) -> {try {systemStatus.put(k, v);} catch (JSONException e) {}});
-        JSONArray members = new JSONArray();
-        HazelcastInstance hi = Switchboard.getSwitchboard().localcluster_hazelcast;
+        final JSONObject systemStatus = new JSONObject(true);
+        Memory.status().forEach((k, v) -> {try {systemStatus.put(k, v);} catch (final JSONException e) {}});
+        final JSONArray members = new JSONArray();
+        final HazelcastInstance hi = Switchboard.getSwitchboard().localcluster_hazelcast;
+        if (hi != null) {
 	        String uuid = hi.getCluster().getLocalMember().getUuid().toString();
 	        hi.getMap("status").put(uuid, Memory.status());
-        for (Member member: hi.getCluster().getMembers()) {
-            JSONObject m = new JSONObject(true);
+	        for (final Member member: hi.getCluster().getMembers()) {
+	            final JSONObject m = new JSONObject(true);
 	            uuid = member.getUuid().toString();
 	            m.put("uuid", uuid);
 	            m.put("host", member.getAddress().getHost());
@@ -74,16 +75,18 @@ public class localpeers {
 	            m.put("isLite", member.isLiteMember());
 	            m.put("isLocal", member.localMember());
 	            @SuppressWarnings("unchecked")
+				final
 	            Map<String, Object> status = (Map<String, Object>) hi.getMap("status").get(uuid);
 	            m.put("status", status);
 	            members.put(m);
 	        }
 	        systemStatus.put("hazelcast_cluster_name", hi.getConfig().getClusterName());
 	        systemStatus.put("hazelcast_instance_name", hi.getConfig().getInstanceName());
-        Collection<String> interfaces = hi.getConfig().getNetworkConfig().getInterfaces().getInterfaces();
+	        final Collection<String> interfaces = hi.getConfig().getNetworkConfig().getInterfaces().getInterfaces();
 	        systemStatus.put("hazelcast_interfaces", interfaces);
 	        systemStatus.put("hazelcast_members", members);
 	        systemStatus.put("hazelcast_members_count", members.length());
+        }
 
         return systemStatus;
     }

source/net/yacy/search/Switchboard.java

@@ -665,9 +665,14 @@ public final class Switchboard extends serverSwitch {
         join.getMulticastConfig().setEnabled(true);
         final Config config = new Config().setClusterName("YaCyP2P").setInstanceName("Peer").setNetworkConfig(networkConfig);
         config.getCPSubsystemConfig().setCPMemberCount(3);
+        try {
         	this.localcluster_hazelcast = Hazelcast.newHazelcastInstance(config);
         	final String uuid = this.localcluster_hazelcast.getCluster().getLocalMember().getUuid().toString();
         	this.localcluster_hazelcast.getMap("status").put(uuid, Memory.status());
+        } catch (final Exception e) {
+        	this.log.warn(e);
+        	this.localcluster_hazelcast = null;
+        }
 
         // load domainList
         try {
@@ -1345,7 +1350,7 @@ public final class Switchboard extends serverSwitch {
     }
 
     @Override
-    public void setHttpServer(YaCyHttpServer server) {
+    public void setHttpServer(final YaCyHttpServer server) {
         super.setHttpServer(server);
 
         // finally start jobs which shall be started after start-up
@@ -2255,7 +2260,7 @@ public final class Switchboard extends serverSwitch {
         return moved;
     }
 
-    private boolean processSurrogateJson(File infile, File outfile) {
+    private boolean processSurrogateJson(final File infile, final File outfile) {
         // parse a file that can be generated with yacy_grid_parser
         // see https://github.com/yacy/yacy_grid_parser/blob/master/README.md
         this.log.info("processing json surrogate " + infile);
@@ -3062,7 +3067,7 @@ public final class Switchboard extends serverSwitch {
      *
      * @param jobType
      */
-    public void pauseCrawlJob(final String jobType, String cause) {
+    public void pauseCrawlJob(final String jobType, final String cause) {
         final Object[] status = this.crawlJobsStatus.get(jobType);
         synchronized ( status[SwitchboardConstants.CRAWLJOB_SYNC] ) {
             status[SwitchboardConstants.CRAWLJOB_STATUS] = Boolean.TRUE;
@@ -3807,7 +3812,7 @@ public final class Switchboard extends serverSwitch {
      * @param url
      * @return null if this was ok. If this failed, return a string with a fail reason
      */
-    public String stackUrl(CrawlProfile profile, DigestURL url) {
+    public String stackUrl(final CrawlProfile profile, final DigestURL url) {
 
         final byte[] handle = ASCII.getBytes(profile.handle());
 
@@ -4186,11 +4191,11 @@ public final class Switchboard extends serverSwitch {
         return 1;
     }
 
-    public String encodeDigestAuth(String user, String pw) {
+    public String encodeDigestAuth(final String user, final String pw) {
         return "MD5:" + Digest.encodeMD5Hex(user + ":" + sb.getConfig(SwitchboardConstants.ADMIN_REALM,"YaCy") + ":" + pw);
     }
 
-    public String encodeBasicAuth(String user, String pw) {
+    public String encodeBasicAuth(final String user, final String pw) {
         return Digest.encodeMD5Hex(user + ":" + pw);
     }