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SOLR-13672: Cloud -> Zk Status page now parses response from Zookeeper 3.5.5 correctly

This commit is contained in:
Jan Høydahl 2019-08-02 13:01:20 +02:00
parent 52b5ec8068
commit 1123afae94
2 changed files with 25 additions and 17 deletions
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2
solr/CHANGES.txt
View File

@ -126,6 +126,8 @@ Bug Fixes
* SOLR-13664: Fixed SolrTestCaseJ4.deleteCore() to properly reset the dataDir used by initCore()
(hossman)
* SOLR-13672: Cloud -> Zk Status page now parses response from Zookeeper 3.5.5 correctly (Jörn Franke, janhoy)
Other Changes
----------------------

40
solr/core/src/java/org/apache/solr/handler/admin/ZookeeperStatusHandler.java
View File

@ -99,6 +99,9 @@ public final class ZookeeperStatusHandler extends RequestHandlerBase {
for (String zk : zookeepers) {
try {
Map<String, Object> stat = monitorZookeeper(zk);
if (stat.containsKey("errors")) {
errors.addAll((List<String>)stat.get("errors"));
}
details.add(stat);
if ("true".equals(String.valueOf(stat.get("ok")))) {
numOk++;
@ -115,13 +118,12 @@ public final class ZookeeperStatusHandler extends RequestHandlerBase {
} catch (SolrException se) {
log.warn("Failed talking to zookeeper" + zk, se);
errors.add(se.getMessage());
zkStatus.put("errors", errors);
Map<String, Object> stat = new HashMap<>();
stat.put("host", zk);
stat.put("ok", false);
zkStatus.put("status", STATUS_YELLOW);
return zkStatus;
}
status = STATUS_YELLOW;
details.add(stat);
}
}
zkStatus.put("details", details);
if (followers+leaders > 0 && standalone > 0) {
@ -180,36 +182,34 @@ public final class ZookeeperStatusHandler extends RequestHandlerBase {
private Map<String, Object> monitorZookeeper(String zkHostPort) throws SolrException {
Map<String, Object> obj = new HashMap<>();
List<String> errors = new ArrayList<>();
obj.put("host", zkHostPort);
List<String> lines = getZkRawResponse(zkHostPort, "ruok");
boolean ok = "imok".equals(lines.get(0));
if (ok == false) {
log.warn("Check 4lw.commands.whitelist setting in zookeeper configuration file, ZK response {}", lines.get(0));
throw new SolrException(SolrException.ErrorCode.SERVER_ERROR, lines.get(0) + " Check 4lw.commands.whitelist setting in zookeeper configuration file.");
}
obj.put("ok", ok);
lines = getZkRawResponse(zkHostPort, "mntr");
String[] parts;
for (String line : lines) {
parts = line.split("\t");
String[] parts = line.split("\t");
if (parts.length >= 2) {
obj.put(parts[0], parts[1]);
} else {
log.warn("Check 4lw.commands.whitelist setting in zookeeper configuration file, ZK response {}", line);
throw new SolrException(SolrException.ErrorCode.SERVER_ERROR, line + " Check 4lw.commands.whitelist setting in zookeeper configuration file.");
String err = String.format("Unexpected line in 'mntr' response from Zookeeper %s: %s", zkHostPort, line);
log.warn(err);
errors.add(err);
}
}
lines = getZkRawResponse(zkHostPort, "conf");
for (String line : lines) {
parts = line.split("=");
String[] parts = line.split("=");
if (parts.length >= 2) {
obj.put(parts[0], parts[1]);
} else {
log.warn("Check 4lw.commands.whitelist setting in zookeeper configuration file, ZK response {}", line);
throw new SolrException(SolrException.ErrorCode.SERVER_ERROR, line + " Check 4lw.commands.whitelist setting in zookeeper configuration file.");
} else if (!line.startsWith("membership:")) {
String err = String.format("Unexpected line in 'conf' response from Zookeeper %s: %s", zkHostPort, line);
log.warn(err);
errors.add(err);
}
}
obj.put("errors", errors);
return obj;
}
@ -238,6 +238,12 @@ public final class ZookeeperStatusHandler extends RequestHandlerBase {
if (response == null || response.isEmpty()) {
throw new SolrException(SolrException.ErrorCode.SERVER_ERROR, "Empty response from Zookeeper " + zkHostPort);
}
if (response.size() == 1 && response.get(0).contains("not in the whitelist")) {
throw new SolrException(SolrException.ErrorCode.SERVER_ERROR, "Could not execute " + fourLetterWordCommand +
" towards ZK host " + zkHostPort + ". Add this line to the 'zoo.cfg' " +
"configuration file on each zookeeper node: '4lw.commands.whitelist=mntr,conf,ruok'. See also chapter " +
"'Setting Up an External ZooKeeper Ensemble' in the Solr Reference Guide.");
}
return response;
} catch (IOException e) {
throw new SolrException(SolrException.ErrorCode.SERVER_ERROR, "Failed talking to Zookeeper " + zkHostPort, e);